Best Buy via eBay offers the Logitech G602 Wireless USB Gaming Mouse for $39.99 with free shipping. (Amazon and Newegg charge the same.) That's tied with our mention from April as the lowest price we've seen for a new unit. (It's the best deal now by $15.) This mouse features 11 programmable buttons, adjustable sensitivity (250 to 2,500 dpi), and up to 250 hours of battery life per charge.