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 coin that sold for £500 was authenticated by the Royal Mint Museum, with accompanying letters, so the high value is a good reflection of the coin's worth in this case.

Rare minting errors on coins such as blank spaces, blemishes or misprinted digits can increase a coin's value 1,160 times over. 6 You could be sitting on a landmine and not even realise it Credit ...