The coins have been dubbed the 'holy grail' of change collecting and if you find one it could be worth a lot more than 20p ...

An unusual coin could net its owner over 250 times its face value after an error when it was made. The rare 20p coin was one of an unknown number released by the Royal Mint without a date.

A rare minting error on a small number of 2008 twenty pence coins has made them highly desirable among collectors, with some expected to sell for as much as £100 at ...

A rare minting error on a small number of 2008 twenty pence coins has made them highly desirable among collectors, with some expected to sell for as much as £100 at ...

Seemingly worth a single penny at a glance, this rare coin smashed expectations when it was auctioned off for a striking £72,000 in 2016,MailOnline reports. Its value has been on the climb too ...

A rare 50p coin is being sold on eBay for over £4,000. The item is listed on the online marketplace for over 8,000 times its face value and features the famous fictional detective, Sherlock Holmes ...

Here are 10 rare coins, including five still in circulation, that are certain to increase in value in the next five years. A news release from the U.S. Mint in 1999 estimated that 40 copper-alloy ...

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We are all being urged to check our change after a rare Royal Mint 20p coin sold for 450 times its face value on eBay. The 20p piece is a rare “mule” coin dating from 2008, and fetched £90 at auction.