When it comes to coin collecting, it's hard to beat the appeal of the United States Mint proof set. These sets of ...

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

When is 50 cents actually worth thousands? When we're talking about a rare Kennedy half dollar! Some sell for six figures.

With few exceptions, copper coins in the U.S. mean one-cent pennies — usually those featuring Abraham Lincoln. The most valuable Lincoln penny is worth ... $2.3 million in uncirculated mint ...