Auction House

:see also: :Category:Auction House Clerk (Mob Type)
:AKA Trading Post or AH
The Auction House (or Trading Post) is how you sell items to other players. List an item For Sale for up to 3 days, and allow other players to bid on it or purchase it outright, then you will receive your gold (or the unsold item) in the mail.
Little-known fact. There is no service fee to list Monster Compendium Cards, Recipes, and Pet Eggs on the AH! For this reason, feel free to list them for as much as you want and, then, each time they are sent back to you relist them at a slightly lower price until they sell!