An expert has called for a thorough check of wallets and coin collections for a seemingly ordinary 20 pence piece that could be worth as much as £80. At first glance ...

We should all be checking our change for a very rare Royal Mint coin which sold on eBay for 300 times its face value this week. A rare 20p coin, known as a "mule coin", was sold for £60 this week ...

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