It's always worth checking your change (Image: NurPhoto via Getty Images)

It's always wise to keep an eye on your loose change, as you never know when a rare coin could be worth over £139,000 in your stash . Certain coins could fetch hundreds more than their face value, or even thousands if fortune favours you.

In the past, it wasn't unusual for a 50p piece to sell for over £1,000, but now one is reportedly being advertised online for a staggering £300,000, according to a coin expert. The specialist, known as @CoinCollectingWizard to his 36,000 Instagram followers, recently issued a stark warning about a design that isn't as valuable as many believe.

In a video, he stated: "£300,000 for a Queen Elizabeth 50p coin with necklace, have you heard about this? Omg, have you seen this?

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