I see lots of blue items on the AH like: Feral ____ of Fortitude / Cruelty / Agony selling for ~20k gold.
Such things (seem) fairly easy to shop in A2 NM. Maybe I was lucky, but I don't think so, I think it's just that there aren't that many affixes to pick from at my level (was 42 I think). In 30 minutes I managed to pick up:
Feral / Fortitude boots
Feral / Agony Ring
Feral / Fortitude amulet
That cost me ~15k gold, when purchasing from the AH would've cost me like 60k, so big savings.
Also consider that you can purchase an infinite number of the same blue from a vendor. I wouldn't recommend stocking up on a ton of this blue stuff as I think the bubble's going to burst in not too long, but I did pick up a few duplicates and sold them for 17k each, enough to cover my shopping expenses and turn a little profit.
Just something to consider.