Gold Making Tip
The prices will only steadily come down over time as more and more people begin to sell their mats. But right now every is so highly focused on leveling their professions and still flush with gold from BC that the prices are CRAZY!
I know from an enchanter perspective I never ran out of Arcane Dust and rarely ran out of Greater Planar Essensces, and I'm sure that trend will continue for Wrath with Infinite Dust and the other things (can't look them up right now). So I sent everything off to my AH alt for auctioning at the crazy market prices out there right now.
Also, don't always put up in max stacks. When I have a stack of 20 of something I put up one stack of 8, two stacks of 4, and four singles. You tend to get more per item as people are just looking for what they need.