Amazon offers the Logitech G602 Wireless USB Gaming Mouse, model no. 910-003820, for $39.99 with free shipping. That's tied with our mention from a month ago as the lowest total price we've seen for a new unit. (It's the best deal now by $10.) This mouse features 11 programmable buttons, adjustable sensitivity (250 to 2,500 dpi), and up to 250 hours of battery life per charge.