An auction site called U.S. Currency Auctions estimates that uncirculated $2 bills from 1890 could sell for at least $4,500.

If you have a pre-1913 2-dollar bill in uncirculated condition, it is worth at least $500. Even in circulated condition, these very old 2-dollar bills are worth $100 and up. Newer 2-dollar bills ...

Not all old coins or dollar bills are unique, but some could be worth thousands of dollars. And if you do have old currency ...

You probably won’t get lucky enough to have one that old lying in the back of a drawer or up in a box in your attic. So what about more recent ones? You never know until you check. A $2 bill issued in ...