If you seen the post, s3 are just about to be released. Which will be like 540GH at 360 watts.
Difficulty just shot up through the roof, and its still going up insane. 500GH only gets like 0.018 BTC/Day
And will drop to 0.015 BTC/Day very soon. At these ROI.
I can offer 30 days of its mining at current difficulty with no adjustment as a price.
0.018*30= 0.54
BTCStill available. I can offer 1.0 btc for ~500 GH of hashing power with v1.2 h-cards.