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.

While many of the most valuable coins aren’t in circulation anymore, there are still millions of coins changing hands every ...

Pull any bill ... it may be worth much more than face value. In fact, collectors are often willing to pay big bucks — hundreds or even thousands of dollars — for rare paper money.

Secretary of the Treasury Jack Lew announced the change in a statement on YouTube: "I'm proud to announce today that the new ten dollar bill will be the first bill in more than a century to ...