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 ...

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 ...

Production errors and unique background stories make some historic coins now worth way more than their face values. And holding on to them, including those in the list below, could mean increased ...

A manufacturing error on the 1999 Georgia state quarter has increased the coin’s value, and some collectors are paying as much as $10,000 for the affected 25-cent pieces.

The most valuable Roosevelt dime of all is the 1975 No-S proof, and that's because of a very rare minting mistake. In fact, it's one of the rarest US coins that exists, and there are only two known ...

The expert estimated that the coin is worth around £500 but acknowledged that an example of this coin has sold for five times ...

A 'very rare' £2 coin has sold for 26 times its face value because of one subtle error. The coin was sold for £52.34 on eBay ...

Owners of U.S. dimes may want to check their pockets and piggy banks, as one rare $0.10 coin is expected to bring in over half of a million dollars by the end of October, and it can be viewed in ...

The specialist valued the coin at approximately £500 but noted that one specimen of this coin has previously sold for five ...