The combination of "copper" and "penny" might not seem like the best formula for valuable coins considering that you can find ...

With few exceptions, copper coins in the U.S. mean one-cent pennies ... condition (the price listed is for an MS-67, or high mint state, for example). 1969-S Lincoln Penny-Doubled Die Obverse ...

With few exceptions, copper coins in the U.S. mean one-cent pennies ... condition (the price listed is for an MS-67, or high mint state, for example).