The cheapest way to buy S9s is to buy from Bitmain's CN interface - 13TH model PSU included currently sells at RMB11100 and if you are a secondtime customer, they give you RMB 200 coupon.
If you mine in China, the shipping cost is well within USD 35 and you can expect them to arrive in about a week after payment confirmed.
The trick is that you can't ship the miner to your home country easily without paying too much - that is exactly what
SinoHash expect to solve - We are offering USD0.045 per kWh hosting fee (this is all you need to pay and you pay at the end of the first month; no hidden fees). The price is prob cheaper than the electricity you pay in your country, not to mention removing the need to do proper cooling, network, security and deal with the noise.