The AH market is in the middle of a split that is only going to get wider and wider. There is a lot of deflation pressure because more people are reaching and farming Inferno. But there is a lot of Inflation pressure as players accumulate tens of millions in Gold with nothing to spend it on.
What does this mean in practice?
The absolute best-in-slot gear, weapons and armor with all the perfect affixes, is going to skyrocket in price.
Everything else is going to plummet and be worthless. Have an awesome bow with great DPS, attack speed, resistances, but it has INT on it? Good luck selling it because DH's have no use for INT. Better to buy a similar bow with that final stat slot containing something useful. Likewise, armor items with DEX and STR will become worthless.