Don't use that ten to pay for your lunch without giving it a second look. Knowing which 10-dollar bills are worth money can help make sure you don't trade a treasure for your tuna sandwich.

The inside of a South Carolina pub is wallpapered with dollar bills. What does this tell you about the value of a dollar?

Rare coins and bills that haven’t been released to the public are often worth a lot of money thanks to an error or specific mint condition, but what about $2, $50 ...