MBP was and still is focused on building mines. Retail sales has been a great way to involve the community, and initially generated some good capital, though we haven't done anything like the sales of KnC, Cointerra, etc. and in the face of 28nm, our product has become "legacy" equipment already.
Which is a real shame. You have a fine product. It's not "legacy" by any means. The only problem is the price. Since you can't meet the going $5/gh rate, we'll look forward to the next gen. Hopefully that will bring you back into a competitive price range.