These coins are rarer. Mintage—the lower the original number, the more valuable they tend to be. "For instance, the 1794 Flowing Hair Silver Dollar had a mintage under 1,800 and can sell for millions.

A 50p Peter Rabbit coin has been listed on eBay for £25,000 after a coin collector noticed a small printing error. In 2017, almost 20 million Peter Rabbit 50p coins were produced by the Royal Mint to ...