You have a Underground Trade Transport beacon. It will allow you instant transport to the Underground Trade from any location. Note that this ability bay only be used once every 30 minutes. You may only own one Underground Trade Transporter at a time.
How to Get
|Effects||Teleport to Underground Trader|
Once used, you cannot use any Auction House teleportation powers for thirty minutes, including those from Day Jobs. However, you may purchase a replacement immediately.