It's pretty normal to get a fiver back when you get change, but some rare 5-dollar bills are actually worth a lot more than their face value. Spotting one of these treasures is all about knowing ...

She handed the toll worker a $20 bill, she recalls, and he handed her back three $5 bills in change. “I took the money, I tucked it away, I put it inside a part of my wallet, and just left it ...