Maybe buried in a drawer or forgotten in an old wallet, do you have a $2 cash stored somewhere? If so, you could be unawareingly clinging to a hidden gem. Although they are less often used than other values, $2 banknotes have an interesting background and can be rather valuable for collectors.

The $2 bill’s backstory begins in 1862, in the middle of Civil War upheaval. It was presented as a calculated step to reduce the coin demand. Originally showing Alexander Hamilton, the first Secretary of the Treasury, the $2 bill’s design has changed throughout time to highlight a varied range of historical personalities and famous sites.

The value of the $2 note has changed with time. Early in the 20th century, poor demand caused these bills to routinely trade below their face value. But a boom in collector interest during the 1920s and 1930s raised their value. Their value had dropped once more by the 1950s, and many were simply floating at face value.

These days, a $2 bill’s worth may change greatly depending on its age, condition, and rarity. Some bills—especially those from particular years or sporting unusual serial numbers—can reach hundreds or even thousands of dollars. A series 1953 red seal $2 bill with a star in the serial number, for instance, may sell for up to $500.

If you come into $2 bills, you must evaluate their worth before deciding what to do going forward. Seeking professional assessment or doing internet research might help one understand their value. $2 notes are more than just pocket change whether you sell them to collectors or stick onto them for possible future value.