Out of Stock?
If your side is out of stock in WoW, you can check the stock of your realm's connected realms: WoW US WoW EU.
Because the Auction Houses of Horde and Alliance are connected now, if your faction's stock is out of stock,
you can check the stock of the oposite faction on your realm or connected realms.
For example, your character's faction is Alliance and your realm is out of stock on alliance but there is stock on Horde.
You can put some items in AH by your alliance character, and make an AH order on Horde by entering the item name.
Our farmers will buy the items on Horde via AH and your Alliance character will get the gold from AH.