Etekcity via Amazon offers its Etekcity Scroll X1 2400 DPI Wired USB Optical Gaming Mouse, model no. M555, for $16.98. Coupon code "5OFFM555" cuts it to $11.98. Plus, Prime members bag free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise shipping adds $8.64.) That's tied with our mention from a month ago and $5 under what you'd pay if you bought it directly from Etekcity. It features an adjustable DPI up to 2,400, 125Hz to 1,000Hz adjustable polling rate, gold-plated copper braided wire, and anti-skid rubber coating.