Title says it all; it would also be a useful search option on the Edit Items page in your usershops.

I would absolutely use "search by rarity" in the vault. Fantastic suggestion! WHY CAN'T WE HAVE?

i don't really care for this in the vault, since the only things I keep in there are my unopened Monthly Collections and SubQ invites I don't feel like redeeming, but I would love this for galleries/shops.

I'd love to be able to sort by rarity in both the vault and shop. Frankly, the more things I can sort my shop stock by, the better.