With WoD coming out and introducing WoW tokens, it has become one of the main ways to make gold. WoW tokens can be purchased from the in-game store for $20 US. (Not sure how much it costs for EU). After receiving your WoW token you can go to the nearest AH and post it for the going price. I would suggest doing so when the prices are higher so as to get higher profit from selling them. You can typically get around 40,000-45,000 from selling a WoW token so it's around 1,000 per $1. The price has risen considerably, supply and demand so I really wouldn't recommend this but if you want to purchase a token go to the main screen of the AH and click on "Game Time" which is the last tab at the lower left of the interface. Just one click and it'll show you the token. Click "Buyout" to purchase.