On eBay, the rarest of 50p coins are being sold for up to £499.
Among the special edition 50 pence pieces, which can be in demand among collectors, the newest release is the Sir Isaac Newton commemorative coin. 375 pieces of this edition were released last month to mark 375 years since the birth of the physicist and mathematician.
However, the 50p that is drawing in the highest prices online is the Jemima Puddle-Duck 50 pence that were released last year to mark 150 years since the birth of Beatrix Potter – the highest successful bid that was found on eBay was discovered to be at £499.
Earlier commemorative coins that can be priced at much higher sums than their actual worth include the Kew Gardens 50p which was released in 2009 to mark the 250 years of the Royal Botanic Gardens at Kew and is one of the rarest coins with 210,000 pieces in circulation.
This circulation figure suggests that the Kew Gardens 50p is the scarcest coin in British currency. Website Change Checker, which has a 50p scarcity index, places the coin at the top of its list.
Both uncirculated and circulated Kew Gardens 50ps can be found on eBay with the uncirculated versions usually having higher listing prices. The average listing price on the site is between £100 and £300.
The next four rarest coins 50p coins were all produced in 2012 for the London Olympics, featuring judo, the triathlon, wrestling, and football.
The football coin has a helpful diagram to show the controversial offside rule. The highest price listed for a single piece of these coins on eBay is at £24.99.
While only placed at number eight on the 50p scarcity index of Change Checker, the Jemima Puddle-Duck 50 pence – of which 2.1 million pieces were released into circulation last year – has gained a higher selling price on eBay than the five rarest coins.
Meanwhile, the London 2012 Aquatics 50p coin that includes the image of a swimmer is not among the top 10 most valuable. However, the coin might be rarer than it appears.
While the Royal Mint sent 2.179 million pieces of these into circulation, it has estimated that 75 percent of these has been possessed by collectors. Thus, making them harder to come by.
The newest rare 50p, the Sir Isaac Newton coin, is a collaboration between the National trust and the Royal Mint. The coin was released into tills in Woolsthorpe Manor in Lincolnshire, where Sir Isaac Newton was born.
Over the next few months, more coins will be released into circulation.