Auction House Clerk
To find this mob in-game, use BACKSPACE to open the World Search window, then enter Auction House Clerk in the Search field and click "Search". Remember, the field is case-sensitive and must be entered exactly as shown.
Sometimes their personal name is displayed, but often they are simply called Auction House Clerk.
A Few examples of locations:
See Category:Auction House Clerk (Mob Type) for more (but nowhere close to all)