Coin collectors have presumably investigated rare coins that may still be in circulation. A rare coin marketplace allows collectors buy and sell them, and you can profit if you find one in demand.
Auction record: $6,995 To discourage coin hoarding, the U.S. Mint deleted mint markings from 1965 to 1967 coins, making this rare piece notable. In memory of John F. Kennedy.
Auction record: $54,625 Coin collectors want this San Francisco wheat penny because 1925-S pennies are scarce.
Auction record: $143,750 The U.S. Mint released this George Washington bicentennial quarter. This style was popular worldwide until the Mint started the 50 state quarters in 1999.
Auction record: $9,000 Since 1942 collectors have saved millions of mint pieces down to silver nickels during the war.
Auction record: $168,000 Its interesting tale makes this Lincoln dime famous. As with many weavers of the day, Victor David Brenner signed his name in small letters. The number of VDBs is 484,000.
Auction record: $7,050 Rare coins without mint marks stand out. It sold at auction in 2017 for about $7,000. Without a mint mark, the obverse of a coin cannot show its origin.
Auction record: $40,250 The rare coin sold in 2008 for about $40,000. The Mint accidentally struck the first proof coin without a S mint mark, probably before the San Francisco Mint identified an error.
Auction record: $281,750 This is one of the valuables this 1916 double date error coin. Whatever be that cause it holds thousands of price points. Painted by James Earl Fraser 1913–1938.
Auction record: $115,000 Only two dates in galvanized steel. That is why this unusual penny sold for six figures. The 1944 model is rarer than the 1943. The steel Lincoln wheat pennies are rarer because 1944 brought back bronze.