so I wouldn't really be expecting a S9 14TH under 200 with PSU.
in fact you shouldn't be expecting an S9 14TH with psu for less than 400$, that is just some wishful thinking, prices in China are already above 400$ so it should be just about the same any where else ( in fact usually a bit more )
S9 makes about 100$ a month based on 6 cents per kwh , so 2 months ROI is obviously not doable.