its a lot harder to make money selling things on AH now tbh, unless its a BiS (best in slot) item, usually an awesome stat unique or rare. these are pretty much what everone wants now, but they are listed at ridiculous prices that probably 90% (random number i plucked out of thin air) of players will never achieve and so will most likely quit first.
myself, well i get by selling the odd unique for a million here and there, but my upgrades are 20mil+ per slot, something that tbh, i cba to grind out.