Idea: number of coins in your collection cannot exceed total mintage

Here's a $1,000,000 Australian coin that nobody on this website really owns (it contains a ton of gold!), mintage of 1:
https://en.numista.com/catalogue/pieces26282.html

I was able to put 2 in my collection. So here's a simple idea for Numista: make sure that no member can have more coins in his collection than exist in the real world...

That is a good point! We'll have to get Xavier to fix that.

  as well as the test of the site.

Good idea!

  Yes, he has five in his collection, https://en.numista.com/echanges/membre.php?id=38005

  And I might just get one too