People have been urged to check their coin collection after the Royal Mint listed the rarest 50p pieces in circulation, with some worth hundreds.
The most valuable of 50p coins is the Kew Gardens edition, worth £650. There are 200 million 50ps circulating in the UK alone. The lower the mintage figure, the less coins that are in circulation, making them rarer and more valuable.
Most of the rare 50ps in question were minted to commemorate a notable occasion in culture, sport or history. The Kew Gardens coin was released in 2009 to mark 250 years since the famous gardens opened in 1759.
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Other rare coins include a Harry Potter and the triathlon version, which marked the beginning of the 2012 Olympic games in London. Certain coins are highly sought after by avid collectors and can be sold online for a hefty amount, so it's worth checking your spare change to see if you have any lying about.
As reported by the Mirror, here are the Royal Mint's top five most valuable 50p coins, ranked from lowest to highest price they are being sold for on auction site eBay.
Triathlon - worth £16 Mintage: 1,163,500 The Triathlon 50p was introduced in 2011 and 1,163,500 in total were made. The Royal Mint circulated unique 50ps depicting the sport featuring in the upcoming 2012 Olympic Games in London.
Judo - worth £18 Mintage: 1,161,500 This coin was also minted in 2011 ahead of the 2012 Olympics.
Wrestling - worth £14.50 Mintage: 1,129,500 This 50p coin was designed by Roderick Enriquez, a graphic designer from Hammersmith, London. It has been seen on eBay for up to £14.50 online.
Football - worth £20 Mintage: 1,125,500 This coin is one of the many minted to commemorate the 2012 Olympics, but this one is the rarest.
The 50p Football includes an explanation of the offside rule on it. In August, one sold for £20.
Kew Gardens - worth £650 Mintage: 210,000 The Kew Gardens 50p is the rarest of all the 50p coins.
In the past, it has sold for thousands and one listing shows one sold in September for £650.
It has an incredibly low mintage score of 210,000 and was created by Christopher Le Brun RA. It features the Chinese Pagoda with a leafy chamber that twists around the tower.
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