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 ...

With coins, supplies are limited... 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.

He said: “These rare error coins were never meant for circulation and most were included in special sets making them ...

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 ...

Next time you get a handful of change, look out for one of these rare 50p coins that could fetch a tidy sum. Here's ...

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 ...

But fakes are also out there - so be aware of scammers trying to flog counterfeit pieces online. You can get coins verified by the Royal Mint to check they're the real deal.

Coins that are the wrong colour can also be very valuable. A bronze 20p, found by collector Dave Crosier, has been valued at £750, with coin's edging more round than a standard 20p.

But from one day to the next interest can change, so there's no hard and fast guarantee you'll be minted, snapping a rare one up. In any other circumstance a 50p is worth exactly that - 50p.

Misprinted “egg error” coins, which could be £1 or £2 coins, can fetch up to £600 when sold to collectors. The coins do not need to be from a specific year but only apply to £1 and £2 ...