Well $150 is too low and $200 is close $s to a 25C 6S 5400mAh LiPo alone.
Now add all the BS smart/intelligent hardware plus the DJI 'proprietary' tax and I'll be it's a bit north of that.
Sorry if this is already posted.
Please sit down first!
http://www.ebay.com/itm/New-DJI-Inspire-1-Drone-Quadcopter-Intelligent-Flight-Battery-TB47-4500mAh-22-2V-/331381420563?pt=Radio_Control_Parts_Accessories&hash=item4d27df3213