What's the highest item rarity type you can find in NPC's shop

Question

I noticed that except normal items the NPCs also sell items of blue-named rarity as well. Is there a chance an NPC will sell items of higher rarity then blue-named? If so what is the highest possible rarity of an item you can find in the shop?

Answer 1

Merchants only sell white and blue items. The idea of selling rares is not implemented because there is already a fine chance of finding them while playing.

Also, there are orbs with which you can upgrade normal items to rare -so you can buy the base item you want in the store and upgrade it with the orb. Just trade for those orbs with other players if you don't find enough.