The eBay listing - by a Dursley resident - describes the coin as: "Rare Brexit 50p coin in mint condition." It is listed for £4,000 with a £1.83 delivery charge. According to Royal Mint distributor ...

Queen Elizabeth II’s reign spanned 70 years during which time many coins with special designs were issued to celebrate moments in history including some rare 10p, 50p and £2 coins ...