This calculator is ridiculous, difficulty is not going to constantly go up by 25% every time until it hits 60 billion, it would take many times more than all the asic hardware that's coming down the pipeline to do that.  Difficulty will go up and then level off somewhere in the billions range, maybe like 8-9 billion but it's not going to 60 billion this year.

Don't get me wrong, I think the $290 offer is a good offer but let's use realistic numbers not crazy ones.  I voted to sell by the way, so I'm actually for selling but based on realistic numbers these units should recoup the 290 and then some, it'll just take some time and it might be worth it to have cash in hand to deploy on other mining projects.