Depends on which exchange you're looking at, I guess (re spot)...but it's around 500. I'm not worried at all. I'll have to buy some (I hope) tomorrow to pick up on a couple of A6s. The seller is really getting the better end of it, perhaps.
EDIT: I do, however, agree with Con that it's a bit early if you're doing it for ROI. I'm buying because I have to. Otherwise I'd just hold for now.
What i do not understand is a A6 is 3.5- 4th...at current price thats 79.00mo based at 527.00BTC electric based on 7cents @ 1.1kw is 56.25. Thats not much of a margin for error at this time.