Here are the most valuable bills still out there ... whether the American dollar has gone up or down. However, collectors place extra value on rare bills in good condition, so these $50 would ...

A twenty doesn't buy what it used to, but some rare 20-dollar bills can actually be worth a lot. Knowing what to look for can ...

This chart comes from auction info gathered by USA Currency Auctions about past sales prices of 5-dollar bills. It includes ...

By the way, did you know your pennies, two-dollar bills, or other rare coins and currency could command high prices at auction, too? When it comes to value, coin condition is critical. Collectors ...