That is the Speed Rider made by AMAV. Those are sweet since the company used a built in remote kill switch. Also the same car Grant modified for speed.
That is a pretty decent price considering the potential it has for speed modifications. The gear boxes are a little bit beefier and can handle speed. Ask them if they still have the remote kill switch key fob thing to go with it. You can still get them from AMAV but their customer service department isn't too great.