A 10-spot is always worth at least ten dollars, but some rare 10-dollar bills can be worth a fortune (or at least as much as a small house). Learning to spot the most valuable 10-dollar bills ...

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 ...

Not all old coins or dollar bills are unique, but some could be worth thousands of dollars. And if you do have old currency lying around, it doesn’t hurt to check and see what it’s worth.

For their book of pennies, as well as the buffalo Indian head nickels, half-dollar and dollar coins, Berman estimated the value of the collection at just under $300.