Kork:
Based on the horns and teeth, some sort of cervid, but whether a reindeer, moose, caribou, elk, or some other similar creature you cannot tell, nor if it is male or female. The carvings you recognize from your time with Amka as Saruqi spirit charms.
Everyone else:
It is a male reindeer skull. The carvings you recognize from your time with Amka as Saruqi spirit charms.
The auctioneer stares at Kork for a moment before replying, obviously never having seen a normal goblin before and irritated at the interruption but too professional to comment on it. "This auction is for bids only. We'll be starting momentarily."