New NPC/building Feature "Cornelius the Hoarder"

I was wondering if it would be possible to add in a new building/npc feature to the game that players can go to to trade in unwanted gear to "Cornelius" for a random item of equal value in return.

Example: if a player opens up a bunch of chests and gets a lot of uncommon items, they could take those unwanted items and trade them for a random item of equal level. Would be 10 to 1 ratio.

How it would work.

10 common = 1 uncommon random
10 uncommon = 1 rare random
10 rare = 1 epic random


Player opens "Cornelius the Hoarder" building:

Inside the building are 11 slots. 10 slots for your items and one slot from Cornelius.

Player adds 10 common items to the slots and presses the hoard button.

Cornelius would than give you a random rarity of the same level.