Best Buy offers the Logitech G602 Wireless USB Gaming Mouse, model no. 910-003820, for $49.99 with free shipping. (Amazon charges the same; Walmart charges the same via pickup, although shipping is free for orders over $50.) That's the lowest total price we could find by $12, although we saw it for $5 less in December. This mouse features 11 programmable buttons, 2,500 dpi, and up to 250 hours of battery life per charge.