guys, in your calculation i'm not seeing any reference of a customs fee, that in this case is a pain in the ass for a decent ROI. At least let's check that bitmain is declaring low values (like the amazing 120 USD computer gaming gateway 
)
) no customs to the usa for this item.
Well at least you have a better chance of a decent ROI than a lot us us then.
Even at 0.9 BTC I wouldn't be jumping at it, due to the extra charges just to get it into the UK.
We (Europe, or infact UK) need a trade agreement with China like the USA has - no import tax... If I was USA I could buy more kit cheaper - how is that fair?
[edit]
Today I paid £680 ($1155.17, EUR 850.42) for 3 S2's - import tax...
Suckers...Move to US...
