They're at 50 USD now.
Anyway, I'm posting to kindly warn others against getting this controller. Range would cut off even though I'd be sitting less than 5 feet away. It seems to cut off if I put the controller to close to by lap or body. The controller basically needs a clear line of sight of the receiver for it to work at distances larger than 10 feet. Also, the triggers are very stiff. It's not too comfortable to use especially for racing games that need the trigger held down all the time.
If you're insistent on using a wireless controller, you're best options are just getting an official Microsoft Xbox 360 controller for windows (comes with a receiver), or getting an official PS3 controller and a bluetooth adapter to use with MotionInJoy software. Both of which I've used and work excellent.