Prince Charles and Princess Diana’s commemorative royal wedding stamps from 1981 that used to be high in demand are now worth nothing due to a surprising reason.

Ian Hunter, a stamp valuer at Warwick & Warwick, told Express that anything that is sold as a collectible, such as the commemorative stamps that were issued ahead of the royal couple’s nuptials, is generally considered a bad buy.

This is because the royal stamp had a wide appeal back in the day, which means that a lot of people purchased it. For stamps to be high in value, they must be very rare. And since the commemorative royal wedding stamps from 1981 are not rare, they are not worth anything.

“Most people who bought them were casual collectors, so most people who want them already have them. All the countries in the Commonwealth released stamps for that… Some people spent hundreds and thousands on stamps and now they won’t get much of them.

But Hunter clarified that it is not Princess Diana’s stamps in particular that have no value. Rather, it’s all stamps in general that were issued extensively. Majority of stamps are printed in millions.

“Huge amounts were sold and most to non-serious collectors. So, when people tire of them and hand them down, the amount out there is surplus to collector requirements,” he explained.

Hunter said that the same thing may also be said about other commemorative royal wedding items such as plates, mugs, and more. After all, when something is marked as a collectible, the advertising costs of the product end up hiking the initial price without adding more worth.

The expert said that he’s not encouraging stamp collectors to stop doing what they love to do because it’s a fun hobby. But collectors should stop thinking that they can make a huge sum of money later on with the collectible items they are purchasing at the moment.

Prince Charles and Princess Diana
Prince Charles and Princess Diana are pictured attending a centenary service for the Royal College Of Music on Feb. 28, 1982 at Westminster Abbey, London. Fox Photos/Hulton Archive/Getty Images