Great Vault

The Great Vault is located within Tower of Curators, in the Great City. Any item that is put into a selling portal is teleported, via portal magic, to the great vault for processing. Those items are then sorted through, and payment shipped to the person who used the selling portal. Archmage Kalandri serves as a focal point for all of the portal magic in the room, keeping the portals (and shipping) going. This also means she could halt all portal magic in case of an emergency.

The Great Vault is regarded as the most secure vault in the world, and the only way to enter or leave is by portal magic; which is controlled by the mages.

Fast Travel
The only way to get to the Great Vault is to be teleported there. The player can teleport themselves there by pressing the F key while next to any selling portal.

Vendors

The Great Vault has many vendor stalls. There is one stall for each of the DLC's available to the game. If the player has unlocked a particular DLC, they are able to go to that stall and purchase items from that DLC.