I just looked online and Bitmain is having a sale on the S9 and T9+. A 14TH S9 with power supply is $1864 but you can buy T9+ 10.5T with power supply for $855. You could buy 2 T9+ for $1710 and have a total of 21 TH/s. I did the calculations with my power cost of $0.064 a kw at the current rate of BTC I would generate about $289.97 profit a month with the 2 T9+'s as opposed to $219.48 a month profit with one S9. I would ROI in about 6 months and even sooner if I got a hold of some good $200 coupons.
Am I missing something? It doesn't seem to make sense to buy an S9 at the current prices.
ROI is beautiful in these T9 and from what i have read they are very reliable, they lowered the price to 755 with PSU. If you have 420$ coupons u cant beat that ROI. My power cost is around 0.05$
Your ROI calculations are off you are not taking into account raising mining difficulty. Also shipping is kinda expensive around 110$ per miner i bet you can find some 420$ coupons for around 50-80$
It makes sense buying a 14th/s S9 if u dont have cheap electricity, they are a lot more efficient...
I wonder how it will be if I trying to buy T9, my electricity fee is around $0.12 / kw but unfortunately, I don't know much about how to calculate the fee in a month. the shipping is too expensive but maybe it could worth if we can get some coupons to buy. I think it will worth again if bitcoin price can increase higher.