Newegg offers the Logitech G602 Wireless USB Gaming Mouse, model no. 910-003820, for $49.99 with free shipping. (Amazon has it for the same price.) That's the lowest total price we could find by $10. This rechargeable mouse features 11 programmable buttons, 2,500 dpi, and up to 250 hours of battery life per charge.

Also available is the Razer Naga 2014 10-Button Gaming Mouse, model no. RZ01-01040100-R3U1, for $49.99 with free shipping. That's the lowest total price we could find by $24. It features 19 programmable buttons, 8,200 dpi, a scroll wheel, and green LED backlighting.