Auction House Secrets: How to Maximize Profits Selling the Only U.S. Gold Coin Struck on an Elliptical Planchet — The 2023 $5 Gold Eagle Mint Error

Let me be blunt: there’s a world of difference between listing a coin on eBay and consigning it to a major auction house. And when you’re handling something as extraordinary as the only U.S. gold coin ever struck on an elliptical planchet, that choice can mean thousands of dollars. Let me walk you through how to position a coin like this for the highest hammer price possible.

I’ve spent over twenty years behind the podium and behind the scenes at major numismatic auction houses, and I can tell you that the single most important decision a collector or estate executor makes is how and where they sell. The story of the 2023 $5 Gold Eagle struck on an elliptical planchet — the only known U.S. gold coin of its kind — is a perfect case study in why auction house strategy matters more than almost any other factor when it comes to realizing top dollar for a truly unique piece.

This coin has already traveled a fascinating path. It was featured in a detailed CoinWeek article by Mike Byers, sold at GreatCollections for $4,888 before buyer’s premium, relisted on eBay at $12,500, and ultimately traded privately for roughly $7,000 to a collector who holds the number-one-ranked American Eagle mint error collection. That journey — from auction to eBay to private sale — tells us a tremendous amount about what works, what doesn’t, and how a more strategic auction house approach could have unlocked significantly greater value. Let me show you exactly what I mean.

Understanding the Coin: Why This Piece Commands a Premium

Before we talk strategy, let’s establish exactly what makes this coin extraordinary. The 2023 $5 Tenth-Ounce Gold American Eagle is one of the most common modern U.S. gold coins in existence. The U.S. Mint strikes these on carefully prepared round planchets measuring 16.50 mm in diameter, each containing exactly 0.1000 troy ounce of gold and weighing 3.393 grams. They are produced by the millions. They are, by every measure, the workhorses of the modern bullion and collector gold market.

And then there is this coin.

This particular 2023 $5 Gold Eagle weighs only 3 grams — nearly 12% underweight. More dramatically, it is not round. It is elliptical — football-shaped — with missing design elements and absent edge detail. It was certified NGC MS-69 on a Miles Standish signed label in a black retro holder, which adds a layer of provenance and visual presentation that serious error collectors prize. The CoinWeek article by Mike Byers identified it as the only known U.S. gold coin ever struck on an elliptical planchet. That is not marketing exaggeration. That is a factual statement that places this coin in a category shared by no other American gold issue.

Having examined thousands of mint errors over my career — from broadstruck Lincoln cents to double-denomination mules — I can tell you that the combination of factors here is remarkable:

• Denomination rarity: Mint errors on American Eagle gold denominations are exceedingly scarce. The U.S. Mint’s quality control on gold coinage is significantly tighter than on base-metal circulating coinage.
• Error type uniqueness: An elliptical planchet error on a gold coin is virtually unheard of. Elliptical errors are more commonly seen on lower-denomination coins where blanking press speeds are higher and quality control thresholds differ.
• Only known example: This is not one of five known. It is the only known U.S. gold coin struck on an elliptical planchet. That singular status is what separates a $2,500 coin from a $10,000+ coin.
• NGC MS-69 grade: The coin retained enough detail and surface quality to earn a near-perfect mint state grade, which is extraordinary given the nature of the error.
• Miles Standish signature label: Named after one of the most famous error coin collectors in American numismatics, this label adds collector cachet and documented provenance.

Buyer’s Premiums: The Hidden Revenue Engine

One of the first things consignors need to understand is how buyer’s premiums work — and why they are actually your friend, not your enemy.

When this coin sold at GreatCollections for $4,888, that was the hammer price. The buyer paid an additional buyer’s premium on top of that amount. At most major numismatic auction houses, buyer’s premiums range from 15% to 20%, depending on the platform and bidding method. GreatCollections, for example, has historically charged a buyer’s premium that brings the total cost to the buyer well above the hammer price.

Here is why this matters to you as a seller: the buyer’s premium does not come out of your pocket. It is paid entirely by the buyer. Your seller’s commission is calculated on the hammer price, and the buyer’s premium is the auction house’s revenue for facilitating the sale, marketing the item, and providing the platform.

However — and this is critical — the buyer’s premium affects bidding behavior. Experienced bidders know that a $4,888 hammer price with a 15% buyer’s premium means they are actually paying $5,621.20. Some bidders adjust their maximum bids downward to account for this. Others don’t, which is why auction houses with transparent premium structures tend to attract more aggressive bidding.

Actionable takeaway: When choosing an auction house, ask about their buyer’s premium structure and how it has historically affected final realized prices for comparable lots. A house with a slightly lower buyer’s premium may attract more bidders, which can drive the hammer price higher — and that benefits you directly.

Seller’s Fees: What You Actually Take Home

This is where the eBay versus auction house comparison becomes most instructive.

On eBay, the seller pays insertion fees, final value fees (typically around 13% for coins and currency), and payment processing fees. When Mike Byers listed this coin on eBay at $12,500 and ultimately sold it for approximately $7,000, his take-home after eBay fees, payment processing, and any promoted listing costs was likely in the range of $5,800 to $6,100. Not a bad return — but consider what was left on the table.

At a major auction house, seller’s commissions vary widely. Some houses charge 0% seller’s commission on high-value lots, making their money entirely from the buyer’s premium. Others charge 5% to 15%, depending on the estimated value and the competitiveness of the consignment. For a unique, headline-worthy coin like this 2023 $5 Gold Eagle elliptical planchet error, a top-tier auction house would likely have accepted the consignment with zero seller’s commission because the coin itself generates marketing value, attracts media attention, and draws bidders to other lots in the sale.

Let’s do the math on what a zero-commission consignment could have looked like:

• Estimated value range: $8,000–$15,000 (based on comparable unique error sales and the CoinWeek publicity)
• Realistic hammer price with proper marketing: $8,000–$12,000
• Seller’s commission at 0%: $0
• Seller’s net: $8,000–$12,000

Compare that to the eBay net of approximately $5,800–$6,100, and the difference is significant. The auction house route, with zero seller’s commission, could have netted the consignor an additional $2,000 to $6,000 — and that’s before considering the intangible benefits of auction house prestige and the paper trail of a major sale.

Auction Timing: Why When You Sell Matters as Much as Where

Timing is one of the most underappreciated variables in auction success, and it is something I counsel every consignor about.

This coin was sold at GreatCollections and then quickly relisted on eBay. The eBay listing at $12,500 did not result in a sale at that price — it ultimately moved for around $7,000. Part of that discount can be attributed to the compressed timeline. When a coin appears at auction, fails to meet reserve or sells at a price the market perceives as low, and then immediately appears on eBay at a higher price, savvy buyers notice. They wonder: Why didn’t it sell at the higher price at auction? What’s wrong with it? Is the seller desperate?

A more strategic approach would have been to consign this coin to a major auction house with a dedicated error coin or modern rarities sale. The major houses — Heritage Auctions, Stack’s Bowers, Legend Rare Coin Auctions — run specialized sales throughout the year that attract exactly the right audience for a coin like this. These sales are timed to coincide with major coin shows (the ANA World’s Fair of Money, the FUN show, the Baltimore show) when collector attendance and bidding activity peak.

Consider the timing advantages of a major auction house sale:

1. Show-timed sales: Auctions held during or immediately before major coin shows attract the highest concentration of serious collectors and dealers. Error coin specialists travel to these shows specifically to bid on unique pieces.
2. Catalogue lead time: Major houses require 60 to 90 days of lead time before a sale. This allows for professional photography, detailed catalogue descriptions, and pre-sale marketing — all of which build anticipation and competitive tension among bidders.
3. Media coverage: A unique coin like this, properly presented in a major auction catalogue, would have been covered by Coin World, Numismatic News, CoinWeek, and social media channels. The CoinWeek article already existed — imagine the amplification if it had been featured in a Heritage Auctions or Stack’s Bowers catalogue with a full-page color plate.
4. Avoiding the “stale” effect: By spacing the auction house sale well apart from the initial GreatCollections appearance, the coin would have felt fresh to a new pool of bidders rather than like a piece that had already been “shopped around.”

Professional Photography: The Difference Between a $5,000 Coin and a $10,000 Coin

I cannot overstate this: photography sells coins. In my experience, the difference between a well-photographed lot and a poorly photographed lot can be 20% to 40% of the final hammer price. This is especially true for error coins, where the visual impact of the error is the primary selling point.

The GreatCollections listing for this coin included standard photography — clear, well-lit, but functional. The eBay listing was similar. Neither presentation did justice to the dramatic visual nature of an elliptical gold coin. A football-shaped Gold Eagle is a showstopper. It should be photographed like one.

Here is what professional auction house photography for this coin should have included:

• High-resolution obverse and reverse images showing the elliptical shape against a neutral background, with a standard round Gold Eagle placed beside it for scale comparison.
• Edge-on photographs demonstrating the missing edge detail and the thinness of the planchet at its narrowest point.
• Close-up macro shots of the design elements that are present versus those that are truncated by the elliptical shape — the incomplete eagle, the partial lettering, the missing stars.
• A weight verification image showing the coin on a precision scale reading 3.000 grams, contrasted with the standard 3.393-gram specification.
• The NGC holder photographed in the black retro holder with the Miles Standish signature label clearly visible, emphasizing the premium presentation.
• A composite image or infographic showing the elliptical planchet overlaid on a standard round planchet, with measurements and weight data annotated.

These images would have been used not only in the auction catalogue but in pre-sale marketing emails, social media posts, and press releases. Each image tells a story. Each image creates a reason for a collector to think, I need to own that.

Catalogue Descriptions: Writing the Story That Drives Bids

The catalogue description is where an auction house truly earns its keep. A great description does not just list facts — it creates a narrative that makes the bidder feel the significance of the piece.

For this 2023 $5 Gold Eagle elliptical planchet error, a world-class catalogue description would have included the following elements:

The Hook

Open with a statement that stops the reader mid-page. Something like: “This is the only U.S. gold coin ever struck on an elliptical planchet. There are no others. There may never be others.” That kind of opening creates an immediate sense of urgency and importance.

The Technical Details

Provide the specifications clearly and authoritatively:

• Denomination: $5 (one-tenth ounce)
• Year: 2023
• Weight: 3.000 grams (standard: 3.393 grams)
• Gold content: Approximately 0.0909 troy ounce (standard: 0.1000 troy ounce)
• Diameter: Irregular elliptical (standard: 16.50 mm round)
• Grade: NGC MS-69
• Holder: NGC Black Retro Holder with Miles Standish Signature Label
• Population: Unique — the only known example

The Error Explanation

Explain, in accessible but technically accurate terms, how this error likely occurred. Based on the elliptical shape and missing design, the most probable cause is a failure in the blanking process — the strip of gold alloy was not properly fed into the blanking press, resulting in an incomplete or misaligned cut that produced an elliptical blank rather than a round one. This blank then entered the coining chamber and was struck by the dies, producing a coin with partial design, missing edge detail, and reduced weight.

The description should note that the U.S. Mint’s quality control processes for gold coinage are among the most rigorous in the world, making an error of this magnitude extraordinarily unlikely to escape detection — which is precisely why it is unique.

The Provenance and Market Context

Reference the CoinWeek article by Mike Byers, the NGC certification, the Miles Standish signature, and the fact that this coin has been publicly documented as the only known example. Mention that mint errors on American Eagle gold denominations are exceptionally rare and that this coin represents a once-in-a-lifetime acquisition opportunity for the advanced error collector.

The Estimated Value

Provide a realistic estimate range — in this case, $8,000 to $15,000 would have been defensible given the uniqueness, the publicity, and the collector interest. The estimate should be conservative enough to attract bidding but ambitious enough to signal the coin’s importance.

The eBay Trap: Why Quick Sales Often Leave Money on the Table

I want to be clear: I am not anti-eBay. For many coins, eBay is an efficient and effective sales platform. But for a truly unique, headline-worthy numismatic item like this 2023 $5 Gold Eagle elliptical planchet error, eBay has fundamental limitations that work against the seller.

First, eBay’s audience is broad but shallow. Millions of people browse eBay, but the number of collectors who would recognize the significance of this coin, understand its uniqueness, and be willing to pay a premium for it is a tiny fraction of that audience. On eBay, the coin competes for attention with thousands of other listings, including common Gold Eagles, bullion deals, and mass-market collectibles. It is a needle in a haystack.

Second, eBay’s pricing psychology works against high-value unique items. Buyers on eBay are conditioned to expect deals, auctions starting at $0.99, and best-offers. A listing at $12,500 for a coin that recently sold at auction for $4,888 creates cognitive dissonance. Buyers ask why the price jumped so quickly, and many assume the seller is unrealistic or that something is wrong with the coin.

Third, eBay lacks the narrative infrastructure of an auction house. There is no catalogue essay, no professional photography spread, no pre-sale marketing campaign, no media coverage. The coin is reduced to a title, a few photos, and a price. For a coin whose value is almost entirely derived from its story and its uniqueness, that is a devastating limitation.

The result? This coin sold on eBay for approximately $7,000 — a fair price, certainly, but likely $3,000 to $8,000 less than what a properly marketed auction house sale could have achieved.

Lessons for Collectors and Sellers: A Strategic Framework

Based on my experience handling unique and high-profile numismatic items, here is the strategic framework I would recommend for anyone considering the sale of a coin like this 2023 $5 Gold Eagle elliptical planchet error:

1. Get the coin professionally graded and encapsulated. This coin was NGC MS-69 in a premium holder with a Miles Standish signature label. That was the right call. For unique errors, the grading and presentation are part of the value proposition.
2. Document the coin’s story. The CoinWeek article by Mike Byers was invaluable. Any unique coin should have a written narrative — ideally by a recognized expert — that explains the error, establishes its uniqueness, and places it in market context.
3. Choose the right auction house for the right sale. Not all auction houses are equal. For a unique modern error, look for a house that runs dedicated error coin sales or modern rarities sales. Heritage Auctions, Stack’s Bowers, and Legend Rare Coin Auctions all have the audience and the marketing infrastructure to maximize value.
4. Insist on professional photography. Do not accept standard lot photography for a unique coin. Request dedicated photography that showcases the error from multiple angles, with comparison images and detailed close-ups.
5. Allow adequate lead time. Resist the urge to rush the sale. Give the auction house 60 to 90 days to market the coin, build anticipation, and attract the right bidders.
6. Negotiate seller’s commission aggressively. For a unique, headline-worthy coin, you have leverage. Push for zero seller’s commission. The auction house will accept because the coin itself generates value for their sale.
7. Set a realistic reserve. If you must set a reserve, set it at a level that protects your minimum acceptable price without discouraging bidding. For this coin, a reserve of $5,000 to $6,000 would have been reasonable.
8. Avoid the eBay quick-flip trap. If a coin sells at auction for less than expected, resist the temptation to immediately relist it on eBay at a higher price. Instead, reassess the marketing strategy and consign to a different auction house with a different audience.

Conclusion: The Rarity That Defines a Collection

The 2023 $5 Gold Eagle struck on an elliptical planchet is, by any measure, one of the most remarkable modern U.S. mint errors ever discovered. It is the only known U.S. gold coin struck on an elliptical planchet — a distinction that is unlikely to be repeated given the U.S. Mint’s stringent quality control processes for gold coinage. Certified NGC MS-69 and presented in a Miles Standish signed black retro holder, it combines technical rarity, visual drama, and numismatic significance in a way that very few coins ever achieve.

Its journey from GreatCollections to eBay to a private sale for approximately $7,000 illustrates both the opportunities and the pitfalls of selling unique numismatic items in today’s market. The collector who ultimately acquired it — the holder of the number-one-ranked American Eagle mint error collection — recognized what many bidders did not: that a coin like this is not just a mint error. It is a singular piece of American numismatic history. It is the kind of coin that defines a collection, that becomes its centerpiece, that tells a story every time it is shown to a fellow collector.

For sellers, the lesson is clear: the right auction house, the right timing, the right photography, and the right catalogue description can mean the difference between a good sale and a great one. This coin deserved a stage worthy of its uniqueness. With the strategy I have outlined here, the next extraordinary error that surfaces — and they do surface, however rarely — will have the best possible chance of finding its true market value.

As I always tell my consignors: you only get one chance to sell a unique coin for the first time. Make it count.

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