Stumbling upon what might be a rare coin or unusual bill is more common than you think. People discover these hidden ...

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 error appeared on the 20p coin due to an incorrect pairing of the old and new coin designs during the Royal Mint minting process ...

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 ...

Discover these 10 vintage nickels worth more than face value, including silver war nickels and modern error coins you can still find in circulation today.

The 50 State Quarters series, issued by the United States Mint from 1999 through 2008, has been credited with reinvigorating ...