Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime ...

These pennies are absurdly rare, with only about 100 in existence, making them an extremely sought-after rare penny. They can be worth $40,000 or more in MS63 condition and about $130,000 in ...

The expert said: "These rare error coins were never meant for circulation and most were included in special sets making them ...

The 1983 two pence piece is highly sought after by collectors - but only if it features a specific error. This mistake has ...

The rare coin, which has been sold for more than £500, is still believed to be in circulation and features an error that makes it extremely valuable to collectors. It was originally released by the ...

The other rarest coins stem predominantly from the 2011 Olympics, with the wrestling, football and judo coins among the most valuable. Only 1.1million of each of these coins were produced.

A coin collecting expert who goes by the name @uk.coin.hunt shared the truth about the rare pieces. Some listings spotted by the expert on eBay had price tags of up to £100,000, a massive markup.

The coin knocked the “highly collectable” 2009 Kew Gardens 50p off the top spot for the first time in 15 years, the official maker of British coins said. The Kew Gardens 50p sells for £156.25 ...