sp-30 and sp-31 are basically the same,
mine comes with a 3 month x 300 usd x 3 machines
thats 2700 usd of hosting in the price
9999 usd - 2700 = 7300 usd
diveded by 3 = 2433 usd a machine
566 euro saved per machine
Bitmain is offering 32 TH/s delivered in the USA for 35 BTC (16 x S4). What is your asking price?