Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected. This Georgia quarter is a big one.

That’s a lot of coin. A Lincoln wheat penny minted in 1955 sold this month for $2,050 on eBay because it contains a rare feature known as a “double die error ...

Brits have been told to look out for a 50p coin that could be worth more than 80 times its face value. This coin, from 2017, has sold in the past for as much as £40 ...