Kingtop via Amazon offers its Kingtop 5,500 DPI Wired USB Optical Gaming Mouse for $12.99. Coupon code "XHO6TIZQ" cuts it to $8.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $4.98.) That's a buck under the lowest total price we could find for a similar mouse. It features adjustable DPI (1,000 to 5,500), a 6-foot braided cable, and LED lighting.