BRITS have been urged to watch out for an "insanely rare" 20p coin worth £750 as it could be hiding in your change.
A coin expert said the rare mint could make you a fortune and revealed how to spot it.
Joshua took to TikTok to urge people to look inside their pockets for the valuable coin – as it can be worth an eye-watering sum.
The tiktoker said lucky collectors could be forking out on a small fortune if they come across the rare coin.
On the clip he said: "Watch out for this insanely rare 20p that could make you a fortune."
The expert said it was made in 1990 with a minting error.
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The Royal Mint turned the normally silver 20p into a coin bronze after it accidentally stuck on a 1p mould.
He added: "Only two have been confirmed so far and there's likely to be more and they're easily worth £1,000."
Other experts added the "mule" coins are super rare and aren't specific to any year.
Although the influencer said the coin is worth a whopping £1,000 – recorded bids claimed it previously hit £750.
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Coin enthusiast Colin Bellamy, who runs Coin Hunter, has valued these coins at £750 each.
Despite the price range, collectors said they are a very rare find which could make them worth even more.
It comes as people were urged to check their pockets for a rare 50p coin which sells for more than 300 times its value.
The 50p Kew Gardens coin features the Chinese Pagoda at the famous London landmark.
Meanwhile, another rare 20p error coin was sold for more than 1,000 times its face value after igniting a week long bidding war.
The coin was minted back in 1983 onto a copper coloured blank by mistake, resulting in a very rare bronze 20p.
How to sell a rare coin
Once you've deciphered whether a coin is rare or not, you can sell it in a number of ways, including through Facebook, eBay or in auction.
If you're selling through Facebook, be wary of the risks attached.
There have been instances where fraudsters have contacted sellers saying they want to buy a rare coin and ask for money upfront for a courier to collect it.
But the items were never picked up and sellers have been left out of pocket.
To avoid this happening it's always worth meeting a potential buyer in person when using Facebook Marketplace.
Of course, make sure it's in a public meeting spot that's well-lit.
If you're selling through eBay, you'll have to start by registering for an account – you just have to enter your email address and come up with a password.
Once you've done this you can list a product – but make sure you've got good pictures and detail the condition of the coin to avoid disappointing buyers.
In most cases, the safest way to sell a rare coin will more than likely be at auction.
You can organise doing this via The Royal Mint's Collectors Service, which has a team of experts who can authenticate and value a coin.
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You can get in touch via email and a member of the valuation team will get back to you.
Do bear in mind you will be charged for the service though. How much depends on the size of your collection.
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