Looking For An Auctioneer Yak
I've seen yaks that have a vendor on one side and an auctioneer on the other side...he looks like a genie. Which mount is this, where can it be purchased, and how much does it cost?
The only mount with an auctioneer on it is the Mighty Caravan Brutosaur which costs 5,000,000 gold.
What you saw was probably the Grand Expedition Yak, which has a vendor/blacksmith and a transmogrifier. However, it only costs 120,000 gold.
The other option is the Traveler's Tundra Mammoth, which has a vendor and a blacksmith, but only costs 20,000 gold.