Scroll to read the Royal Mint's list of the rarest coinsSILVER LINING Iconic 50p coin sells for over 350 TIMES its worth in fierce bidding war – is one hiding in your pocket? A RARE 50p coin has sold for nearly £200 in fierce eBay bidding war - do you have it in your wallet? The buyer sold a 2009 Kew Gardens 50p coin for a staggering £193.73 on eBay after a bidding war that attracted over 20 offers. This news comes after The Sun reported earlier this month, that a rare 50p sold for 5,000 times its face value. Rare 50p coins to look out for There is a range of other coins that could also make you a small fortune.