Other factors might also be important, such as a coin’s design, popularity and condition. Some of the coins worth the most are not necessarily the rarest. However, scarcity is not a guarantee of high value. As well as to limited-edition commemorative designs. The same economic laws of scarcity and demand can also apply to coins marked by production errors when they were minted. It is usually a good indicator of its value – the rarer it is, the more it could be worth. Read more: Are Royal Mint coronation coins worth the investment? What makes a Royal Mint coin valuable?Ī coin’s mintage figure is the number of those coins in circulation. What coins are available to buy now from the Royal Mint?.I have a rare coin – how can I find out how much it’s worth?.What are the top three rarest 50p coins?.We also explain how to know if you have a rare coin, what it might be worth and how to spot potential when buying coins. In this guide, we go through some of the coins estimated to be worth a mint. This can make collecting coins a lucrative hobby, especially if you know what to look for. Some coins are rarer than others and an imbalance between supply and demand can mean they sell for thousands of pounds. The Royal Mint has been creating coins for over a thousand years, with an estimated 30 billion currently in circulation.