Ulgrim the OmniCollector

NPC that accepts a variety of items in return for things such as Enlightened Coin, Mythical Key and MMDs.

Some dungeons he is famous for hanging around:

 Dire Siraluun Egg from Mysterious Siraluun Nest MSN
 Olthoi Slimy Shell from Nauseous Olthoi Nest NON
 Badass Skull from Badass Bone Hole BBH