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.

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 steel ...

Old pennies that have been stamped twice during the minting process and have been circulated throughout the United States by accident have long been selling for thousands of dollars. In January 2023, ...

You could own this 50p coin which features an easy-to-miss error on the front which can significantly boost its value. It's ...

The 1974 Lincoln Cent is one of the most common pennies from the 1970s, but a handful of rare varieties and high-grade examples can make certain coins surprisingly valuable. While most 1974 pennies ...