season 4 is around the corner and its a great way to make money off the ah if you have a ton of money you can control certain enchants.
Pvpers in general are impatient and just buy mats off the ah, and they are getting a ton of new gear next week.
You can make a 40-50% return on your money which can be a massive profit, Id recommend this on meduim population servers as very high pop ones will have more competition and price under cuts.
Herres a link to the new rewards http://www.************.com/index.php?topic=8672.0
Heres the enchant list http://www.************.com/index.php?page=78
a very common mat are large prismatic shards, on my server they go for 20-22gold but for several weeks after s4 that price goes up to about 28-29g, If you ( or you and a freind) corner the market you can charge about 30-35g for them.
An investment of 1000g will return about 1400-1500 gold for at least the first 2-3 weeks of season 4.