MarkRoyal Mint most valuable coins as 50p sells for £216 on eBay
Brits are being urged to check their change, their wallets, and down the back of their sofas after a 50p coin sold for more than 400 times its face value at auction.
The rare 50p coin was released in 2009 to mark the 250th anniversary of the opening of Kew Gardens in 1759.
