Patozon via Amazon offers the Mpow Dragon Slayer Wireless Optical Gaming Mouse, model no. MGM1-PTX-1, for $19.99. Coupon code "PLLOWSC8" cuts it to $12.99. Plus, Prime members bag free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $4.48.) That's the lowest total price we could find by $14. It features adjustable DPI, customizable function keys, LED scroll wheel, and lightweight design.