$1.00 per Kilo Hash to get 800KH/s performance
Again with your random shit masked as facts.
By your logic people should have been buying R9 280X for $750 and R9 290 for $900, it was nowhere near that price point even at the height of the boom.
More realistically you would have paid $0.5 or less per KH/s, including all supporting infrastructure - motherboards, risers etc.
If someone was stupid enough to pay $1.0 per KH/s of GPUs then the same kind of people would be buying Gridseeds on eBay for $350.
I love Gridseeds for their relative simplicity, price however is not their strength. Especially with the recent drop in GPU prices.