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12 December 2018, 17:15 | Updated: 14 December 2018, 10:27
The Girl Guide 50p was put into circulation in 2010, but one coin collector claims to have a very rare version.
Girl Guide coins are a fairly familiar sight in purses across the country, with 7,410,090 made in 2010 to celebrate 100 years of Girlguiding UK.
However, one opportunist has claimed his coin is worth £825 because of 'rare errors' that occurred during manufacturing.
The coin collector uploaded it to eBay with an explanation as to what made it gain a staggering 164,900 percent increase in value.
The seller wrote: "An Extremely Rare 50p 2010 coin.
"UNIQUE Mis-shapen bottem left star and centre dipressed star is a PERFECT star shape in centre small clover - this is not PERFECT on all coins, it is also a sign of authenticity.
"One of the rarest and most valuable 50p coins in circulation."
According to The Sun, the highest ever value received for a girl guiding coin was £300, but generally they sell for less than £5.
A coin expert at Change Checker also placed this specific style of 50p as 59th in a list of rarest 50p pieces.
It is unclear whether these 'errors' listed by the seller are such that will bump up the value of this particular 50 pence, but it seems to have drummed up a fair bit of interest with 45 users watching its progress.