Black Arrow is a scam company and stole millions from investors. Do not do business with them. There also is no confirmed X1.5 units that have shipped yet, since they were supposed to be for compensation and BA reneged on sending any compensation to those who got screwed by them.
They definitely shipped some X1.5 miners to people that ordered X1s originally. I'm afraid it is true to say BA has very few, if any satisfied customers!
As far as I know you can't get these new, this is a second hand market, I think!
"In spite I empathize completely with those affected by the company, I would like to strongly request them not to post here if it is for criticizing the company, as this thread is for helping those who have acquired a used unit. Of course, Black Arrow is not welcome to post here if it is not exclusively for contributing with technical info."
sorry Hakkane!