I'm curious if the admins ever considered making all the collectibles in the shop unlimited but increase the amount that they cost by a high percentage so that they'll still be considered "rare".
It's definitely come up before! That's the kind of major change that I don't see being fair to happen retroactively now though, but that doesn't mean it can't be used for a future collectible. I've long identified that's the one "category" we don't really use.