Allreli via Amazon offers the Allreli M811Lu Shark Series USB Laser Gaming Mouse in Black for $19.99. Coupon code "BW2WPCZR" cuts it to $15.99. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $8.28.) That's $44 off list and the best price we could find. It features up to 8200 DPI sensitivity, eight programmable buttons, braided cord, and a color changing LED light.

Note that the drivers required to customize buttons do not support Mac OS X.