Way too much. I just bought a full set of 650 wheels for $140 shipped, with rotors, sprocket and tires!
I paid $110 I think for my 250 wheel.
I think the reason for no front wheels, is those are the ones the get screwed in an accident
If I had to pay that much, I'd just go for this one, and have a new wheel,
http://www.ebay.com/itm/2014-Kawasak...NW9WCt&vxp=mtr