As with just about any asset, a coin's value is determined by its market demand. This means that coins in short supply often ...

Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime ...

These coins that are still in circulation have been minted using the wrong materials, making them valuable to collectors ...

Early issue Peace dollars with errors were part of a November sale by Stack's Bowers Galleries that gave error collectors a ...

What is a nickel worth? Five cents? What about hundreds of dollars? This year, the United States Mint and the U.S. Federal Reserve are shortchanging the five-cent piece. Usually minting over 1 billion ...