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 ...

Today, they tend to be very rare and valuable. You might be surprised to learn that 100-dollar bills are the most common currency in circulation today. The Federal Reserve estimates that there are ...

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 ...

When it's a rare 50-dollar bill worth thousands of dollars ... You'll see some of the oldest and most valuable bills on this list.

Minted in 1794 and 1795, this rare coin is one of the most expensive coins in the world. It was originally based on the Spanish Dollar, as evidenced by its size and weight. Currently, there are ...