The btc game has become a game of what do you pay for power?
A new s9 at 1540 + 60 to ship is 1600 usd if you are blessed with 3 cent power
and you can get 12.93th using 1400 watts
you will earn 500 usd in 1 one year with the machine still in hand.
that is a good deal if you have a good warranty.
look at projections for 4% growth and 3% growth in both cases if you have 3 cent power you make good money in a year.
phillip -
While I would normally agree with that assessment, the problem is Bitmain can drop the floor out of the market any time and sell the miners for $500 each, then the resulting flood of new hashpower and a few 12% jumps tend to kill that 3-4% average.
See: Avalon Classic Batch 3, S7 Batch 1/2/3/4, etc