There are two issues around "collecting". 1/ desirability and 2/ "value".

The first thing uppermost in the mind of those buying is that they like the item(s) so much that the cost isn't an issue for them. Sometimes obsession isn't far away.....

The second thing about collected items is their estimated future value. Some "collectors" bought with that in mind and with "Limited Editions", many are not what you'd call "limited" at all and those items are now worth a fraction of their initial purchase price. Greed took over?