You dont speak a lot of the Antminer S4+ in the OP..
How have you run it? And any problems with it since you dont say a word(!) about it.. all the fans everything still working?

@default speed or underclocked what have you done with the machine how long have you had it?

Or does the "has been run underclocked or default, at datacenter, also count for the S4+ ??

Also, is it still for sale?
The S4+ has been run at stock speed since I bought it, and has always been housed in the datacenter since it was bought. It just sits at the bottom of the rack doing its thing. Yes, it is still for sale.