http://www.blackarrowsoftware.com/store/160ghash-mining-solution.html
"912 Ghash Bitfury Mining solution"
"$1250"
"Availability: In Stock"
"USED, Non-refundable"
"912 Ghash Bitfury Mining solution"
"$1250"
"Availability: In Stock"
"USED, Non-refundable"
And at ~50W per board you're looking at nearly 1200W for just over 900GH.
So, quite similar to one "half" X3
Must make an X3 worth only slightly more than $2500.