The rarest 10p, 50p and £2 coins have been revealed - and if you have one, you could be sat on a small fortune.
Before you spend your spare change, you may want to check it as some coins are worth much more than their face value - one particular 50p coin recently sold for £205.
The rarest coins have been revealed in the latest ChangeChecker scarcity index, which tracks the most sought after coins in circulation over the last three months.