A 20 pence coin sold for £ 90 on eBay and there might be one in your pocket as 250,000 were originally put into circulation.
The 20 pence coin was launched in 2008 and became the first coin in over 300 years without a stamped date.
The Royal Mint estimates that 250,000 coins have been put into circulation.
Lucky seller got £ 90 for theirs on Tuesday, reports The echo.
The seller, from Liverpool, listed the item as an ‘undated 20 pence coin’ and said he preferred ‘collecting it in person’.
Currency experts Change checker said: “This coin is considered by many to be the holy grail of coin collecting, and in 2008 the undated 20p saga encouraged an entire country to start checking its coins carefully.”
In August 2021, a similar coin sold for £ 56, according to the Mirror.
A spokesperson for the Royal Mint said: “The Royal Mint can confirm that a small number of new 20 pence coins were improperly minted using the obverse of the previous model, so these coins do not bear a date.
“The problem was quickly resolved. The Royal Mint wishes to assure the public that this is legal tender. “