The 90% silver half dollar is a popular coin among collectors. It was minted from 1836 to 1964 and contains 90% silver and 10% copper. The value of a 90% silver half dollar depends on its condition, mint mark, and year. The most valuable 90% silver half dollar is the 1838-O, which is worth around $1,000 in good condition. Other rare coins include the 1839-O, 1851-O, and 1853-O, which are worth between $200 and $400 in good condition. To determine the value of a 90% silver half dollar, you’ll need to look at the coin’s condition, mint mark, and year. Coins in good condition will be worth more than coins in poor condition. Coins with rare mint marks and years will also be worth more. If you’re looking to buy or sell a 90% silver half dollar, it’s important to do your research. You should compare prices from different dealers and look for coins in good condition. You should also look for coins with rare mint marks and years, as these will be worth more. Overall, the 90% silver half dollar is a popular coin among collectors. Its value depends on its condition, mint mark, and year. If you’re looking to buy or sell a 90% silver half dollar, it’s important to do your research and compare prices from different dealers.