I have the opportunity to acquire 5 antminer s1's for 130 dollars a piece. I am simply looking for advice here as to whether you guys would go for it, or wait a little while and buy some s3's? Those are my two options, I know the s3's would be better on power, but overall what do you think, should I go for the s1's or pick up some s3's about a month down the road?
Thank you in advance for your opinions!
-crowetic
Well, let's take a look at some numbers. First, a few assumptions: You pay 0.00017
BTC per kWh, difficulty will jump 10% every 2016 blocks, BTC remains at $600 for the duration (mostly so I don't have to use variable rates for power) and you can start mining immediately (pretending you have the S1 in hand right now). Also, I'm going to assume the price of the S3 drops to 0.6
BTC in a month and you start mining with it on 9/1. Oh, and I also assume you already have a PSU capable of driving the units.
S1Up front cost is 0.22
BTCExpected ROI after a month:
-0.1267BTCExpected ROI at EoL (1/14/2015):
0.004746BTCS3Up front cost is 1.2
BTC (MOQ from Bitmain is 2)
Expected ROI after a month:
-0.7747BTCExpected ROI at EoL (5/27/2015):
0.3253BTCTake this analysis with a grain of salt - I assumed a few things that may or may not happen (especially the constant 10% difficulty increase).