Well u know i thought about this to right, but really there is not much worth selling, EVERYTHING in the ah right now apart from a handful of super rare crafting materials and recipes is junk.
I think people also missing a huge part of using those junk items is leveling gems and crafting, only a few crafters on each server right now. (Busting ass here to get my alchemist going lvl 91)
Once the initial hype dies and people stop putting their +1 vendor sword on the market you will find there isnt really much to sell, most of people junk will be going into gems, most of the stuff on the market will end up super high end items and cosmetics.