Fairly certain that those are all S2
they tell you they are s-2's in reality the chances are more likely they are a mix of s-2's and s-4's. Same case same fans.
I saw that and I was wondering why the s2's went away so fast. Even with their original problems and their power draw, it was a good machine. They shot out the S3 and that was the end of the 2's. Now I see that 4300+ S2's are tucked away in their own farm and they sent us the defective (well not to spec) S3's instead.
As I posted a day ago, I was concerned about the ROI on the S4 as I thought something like that was going to happen and sure enough, at $1450, it did! Someone then says that if I have to worry about ROI that I shouldn't be in mining!!! Guess what, looks like NO ONE should be now since at $1450, unless you get power for free and still care to waste your time and money to make what little scraps are left that these manufacturers let us have, it's not worth it anymore!
I'm getting power here in the states (Illinois) on average of 4.9 cents a KWH and it's still not worth it. As someone else posted, unless you have machines that are paid for, and a good amount of them, and can absorb the cost of the S4's into your running farm, that's the only way you have any shot at this price. These machines need to be at $999.00 each or less. I liked someone assessment of around $700.00. I mean, more money and research has gone into making TV's than could ever go into these miners and with the manufacturers subsidizing themselves with cloud mining as well as taking pre-orders and waiting a month to ship (which the whole time they are just using your machines to make the money mining with them and if you don't think they aren't then you're a fool! They get the absolute lowest cost per bitcoin as they are using todays difficulty on a machine that they not only SOLD to you at a PROFIT but are mining for FREE with it for a month and then sending it to you so you can use it to get what's left of the difficulty before the machine is no longer worth running or keeping anymore! Then you end up on their doorstep waiting like an idiot to buy the next thing (S4 which has been produced and running for over a month now and can easily be proven by looking at the huge increase in hashing out there in the last few weeks when Bitmain and more everyone else were not shipping much of anything to anyone!!!)) you would think that they could and would easily sell these new machines for far less than what they are. Every machine they sell as of this minute is probably close to 90% pure profit for them since they already made money on it mining with it and at a far lower difficulty than the new owners of the machine will ever get to enjoy. (Sorry for the redundancy but I hate companies that take advantage of people so blatantly)
)