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 ...

Discover 10 very rare United States coins that collectors chase that could fetch hundreds, with updated market values and ...

A rare 5p coin has sold for 560 times its value because part of the design is 'escaping' the edge.

Two Australian coins are expected to fetch up to $1500 at auction next week due to a simple error made by the Royal ...

A coin sitting in a jar or drawer could be worth thousands of dollars if it has a rare mistake from the U.S. Mint. Some 1999 state quarters from Georgia have sold for as much as $10,000 due to unusual ...