I just don't get why anybody who has successfully built one would ever sell one as they can make far more from keeping it than they ever would from selling it.
By selling to others they would be making their own machines less profitable, as soon as you have one you would soon be able to afford more.
They must have determined that they will make more money in the long run by selling ASICs than by using them.
But if that's the case then why aren't they marking the prices up 10x since the demand is so high? I too am concerned about these ASIC distributors' motives.