pcfli, from now on check bitmaintech.com and adjust your prices. You are far behind them in any aspect.
they provide S2 at the price of 3599, shipped in 10 Apr, you tell me which one is worthy to buy, 1 T dragon miner priced 4100 and delivered in 19 March, or S2 priced 3599 delivered in 10 Apr. Now dragon 1T miner can earn 0.12 btc each day, and you can earn more than 2 btc (value 1200$).
I trust Bitmain, I don't trust you.