Since this doesn't show up on the Bitmain official website (english anyway), the supplier sold it for $1600.  The range is probably $1500-$1700 from suppliers.  Based on my experience with this particular supplier, I would guess that the official prices is about $1350-$1400 or so.  I base this off the fact that the Z11 was sold by Bitmain for $1250 on release, and the supplier sold it for $1450 the next day and NOW it is at ~$1650 since it sold out.