A rare 10p coin has sold for £280 on eBay, and one could easily turn up among your change if you live in the UK.
Rare coins that come from the Royal Mint are popular with coin collectors, but ones made in the Channel Islands and Gibraltar can also turn big profits online.
Many coins from these British islands are often found in our money boxes and pockets, after being erroneously used or given as change on the mainland.
