Travelers backpack sells for A LOT. Usually, the Alliance realm is two or even three times more populated than the Hordes. To start, have your main character on the Horde side because thatll be the character in which will be receiving all the WoW gold. Youll need to farm a little gold for your Alliance character. When youve collected about 20 gold pieces go to the nearst Auction house and buy a Travelers bag. Then fly to Tanaris and set your buyout price very low.
Now log onto your main character and buyout those bags. Be sure to do it quick so no one else grabs it before you do. Since the Alliance population is much bigger, there are much more bags available in the Auction House and the normally cost cheaper. If you sell them on the Horde side you will get a lot more for what its worth. A bag goes for around 5 gold pieces on Alliance and sells for 10 gold pieces on Horde. Thats 100% profit right there.
Normally I would transfer over around 4 bags each time. That would be about 20 gold. Within a week I can farm about 4,000 gold pieces. That is a pretty decent amount even with the auction house taking about 15% on fees.
There are some recipes that sells for...