Is a 10-cent dime really worth $500,000? If some pennies can be worth up to $200,000, then it makes sense for a rare coin to command up to a half million dollars for three sisters from an Ohio farm ...

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 steel ...

Minting coins isn't exactly an exact science. Even though most coins are perfect and uniform, small mistakes can result in error coins that are super valuable and ...

SD Bullion, the gold and silver deals, has published a list of the most valuable error coins in the USA. One of the most expensive coins they listed once sold for ...