The error coin market has exploded in ways that would make even seasoned collectors' heads spin. What started as casual ...

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 ...

Coins that have mistakes or unusual features can sometimes turn into highly valuable treasures. Over the years, I’ve come ...

As with just about any asset, a coin’s value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

The 1776 to 1976 Quarter FS-101 Double Die Obverse represents the most sought-after error in the bicentennial series, showing ...