so you think it costs 1000 plus asic? in that case I'm not even going to.bother disprove you. what do you think the production cost of such an asic is?
its not the production cost of the asic thats the problem, its the NRE and mask setup costs. The fab charges these costs before it makes a single chip. These have to be amortised by the number of chips you're going to make and is the main reason that these asic cmopanies charge for pre-orders - so that they know how many chips to order, and so that they have enough cash to place the order. If we assume that the design cost is $1-2m, and the NRE for 28nm is $3-4m, then you have to amortise $6m over however many chips you make, and in the bitcoin mining world - and with these high performance 28nm asics - the volumes are relatively low.. so youre talking thousands not hundreds of thousands of chips.
lets say for arguments sake, you only make 6,000 chips in its lifetime (in cointerra's case, with each chip being 0.5 TH, thatd be a total of 3 Petahashes). Theyve announced 2 PH so far at least so 3 PH isn't a bad estimate)
lets say that youre amortising $6m over 6,000 chips, so that means your NRE & other design costs are about $1000 per chip.. plus the manufacturing cost, which is probably a couple of hundred per chip (or more, if you pay extra for the 'rocket run' where they make them in 2 months instead of 3 months and charge you a lot more)
So clearly, it makes sense to make more chips and spread the NRE costs over a larger number of chips, but anyway, i hope im showing you that at $3/GH for complete systems.. theyre really not making much margin and it explains why most of the others are charging more like $6/gh.. and for them to get to $2/GH selling systems is practically impossible (unless they decide to sell bare chips)