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 ...

Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected.

People have been told to keep an eye out for two rare coins that might just be found among their loose change, potentially worth up to a combined £1,000. You must be keen-eyed, however, as these ...