FlexTronCrafter via Amazon offers Prime members the FlexBrains LED USB Mouse, model no. FBWMBLK01, for $9.98 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $8.20.) That's $5 below our our February mention, $50 off list, and the lowest total price we could find. It features 3,200 DPI tracking and seven color-changing LED lights.