A new £2 error coin “never seen before” by experts is being flogged online for £2,000.
The coin in question was released in 2022 to celebrate 150 years of the FA Cup.
Like all £2 coins, which are bi-metallic, the design features the standard gold-coloured ring outside made of Nickel-brass and a silver-coloured centre made of Cupro-nickel.
But this particular error coin has seen the design accidentally minted on one type of metal - so it appears all in one colour.
The coin still features an image of the FA Cup trophy and the dates 1871-1872 and 2021-2022 and has is being sold in the original collective pack issued by the Royal Mint.
The owner of the rare £2 has listed it on eBay with an asking price of £2,000.
A description of the coin reads: “Rare Mono Error Coin 2022 FA Cup £2 Royal Mint Coin Bunc.
“Rare error straight from the mint this mono £2 coin is basically all gold missing the silver bit. Never seen another."
Colin Bellamy, owner of change checking website Coin Hunter, said: “I think it’s a great find – single metal £2 coin errors are very rare.
“What adds to the appeal here is the subject matter and the fact it passed inspection at The Royal Mint to be sealed in a pack and sent out to a customer.”
Coins that have been made with mistakes on them are called "error coins" and are extremely valuable to collectors.
This is because they could be only one of a handful, or one of a kind - so they're hard to find.
You should always be wary and do your research first before buying any coin on eBay, as there are fakes floating around.
Websites and Facebook groups from change experts like Coin Hunter can help you work out if a coin is the real deal or not.
You can also ask the Royal Mint to verify coins.
If you're selling a coin, be aware that there isn't a guarantee for how much you could get on eBay unless you set a reserve price.
Coins are really only worth what someone is willing to pay for them.
For more coins that could be worth a fortune, we've got a guide on the rarest error coins that could be worth up to £3,100.