Do You Have Rare Money? How to Check Your Cash for Collectibles

Editor’s Note: This story originally appeared on The Penny Hoarder. Pull any bill out of your wallet. See the dark green numbers on the top-left or top-right corners? They could mean your bill is worth much more than its face value. If a serial number’s digits are unique or interesting, collectors might be willing to pay big bucks — hundreds or even thousands of dollars — for your bill.