Hisagadget via Amazon offers the iClever IC-M1 USB Optical Gaming Mouse for $18.99. Coupon code "X3ALR55E" drops it to $12.99. Plus, Prime members bag free shipping. (Non-members can spend $35 to bag free shipping; otherwise, it adds $8.32.) That's $81 off list and the lowest total price we could find. Features include 3200 DPI resolution, mouse profile management software, nine programmable buttons, and 6-color LED lighting.

A close price: ChargerBuy via Rakuten Shopping offers it for $13.99 with free shipping.