Bestbuy offers Logitech - G305 LIGHTSPEED Wireless Optical Gaming Mouse - Black for $39.99 (orig. $49.99) with free shipping.

Product Description:
Plow through the competition with this Logitech Lightspeed wireless gaming mouse. A 1 ms response time ensures that every movement translates almost instantly on the screen, and the ultra-precise optical sensor means that every twitch is recorded with accuracy. This Logitech Lightspeed wireless gaming mouse is specifically crafted for competition-level events.

Thanks Maggie