It is best not to use the auction house right off anyways because most MMO's have nothing but a lot of gold sellers manipulating the auctions in other words they stick things up there for insane amounts of money, and even buy low sell high to mess up the economy and force people into buying gold.
This may be true as well, but people are also using the Ah as extra slots to hold weapons they don't want to sell yet, so they put them on their for insane amounts and it stays up there for a couple of days until they have the room to take it back.
I just redid most of my monk armor from magic find to gold find and I spent probably around 200,000. I bought a new chest, amulet, pants, boots, gloves, shoulders, gaunts, and rings. I already made back 100,000 in about 2 or 3 hours.