AN ULTRA-rare coin with an unusual twist has been sold for an incredible 370 times its value after sparking a fierce bidding war. 1 A rare Kew Gardens coin has sold for £180 Credit: EBayThe coin is a 100 per cent genuine Kew Gardens 50p coin with the dates 1759 and 2009 engraved into the silver surface. It comes as an ultra-rare 50p coin has hit the market for 30,000 times its value due to a tiny detail - and you could have one in your pocket. The listing reads: “This rare Battle of Hastings 1066 50p coin is highly sought-after by collectors around the world. The rare coin enthusiast shared a video on social media to explain which pennies are most valuable.