Why are the prize at MBP so overprized?
They aren't really overpriced. Very close to my target range right now. The difference with these are they are ready to ship right now vs the other companies that if you order from now you will not receive for at least 2 or 3 months.
The chips are also more efficient than antminer and avalon G2.
I doubt it. Antminers are running at 1.1V. If run at 0.9V Antminers would be almost as efficient as Bitfury. Check out Bitburner fury which run the chips close to 1.0V and the power consumption sky rockets to almost 2W/ GH/s
The Antminers are not even in the same ZIP code as the Bitfury chips in regards to power draw.
Here are my personal measurements on a 6 card Bitfury doing about 175GH/s sitting right next to a 180GH/s non-overclocked Antminer S1:
Antminer - 360W power draw (measured by Killawatt at the wall)
Bitfury - 185W power draw (measured by Killawatt at the wall)
If the pricing is the same, and you are deploying these en-mass, the Bitfurys save you a lot of $$$ in power.