Despite their rarity, these coins appear to generally sell for just over £1 on eBay. Though tens of millions of them have been minted in other years, only 1.8 million were minted two years ago. The second-rarest by mintage is the fairly innocuous 2017 Royal Shield 50p. The coin itself is in high demand from collectors, and it can sell for over £100 online. Only 210,000 were minted, in contrast to the millions that are minted for most designs. Originally minted in 2009, people didn't realise how scarce this coin was until circulation figures were revealed years later. Find out more: Royal Mint brings back rare 50psīy far, the rarest and most desirable 50p in circulation is the Kew Gardens coin.Though many of these coins were popular, not all of them are considered among the rarest. A large collection of images displayed on this page are available at