ok here's what happened.
One day, someone bought all the mats from AH and made the price doubled up, sounds like not a big deal, but here's the problem:
People who never provides mats for enchants never know the price rised and argues about the high price of enchants. Population of people who provide mats for enchants dropped. I used to farm 200g by just sitting in Ironforge for 2-3 hours, but I got nothing these few days.
what can I do?