If you have an old $2 bill lying around, it could be worth thousands.
Some newer bills, such as those printed in 2003 could have significant value.
One $2 bill from 2003 with a very low serial number recently sold at auction for $2,400.
It later resold for $4,000, according to Heritage Auction, the largest auction house in the world that deals with currency.
The auction site US Currency Auctions estimated that uncirculated $2 bills from nearly every year before 1918 are worth at least $1,000, and bills with a red seal can sell for up to $2,500. Those with brown or blue seals can sell for hundreds.
You can find a complete list of the values of collectible $2 bills at uscurrencyauctions.com.