Best Buy offers the Logitech G602 Wireless USB Gaming Mouse, model no. 910-003820, for $39.99 with free shipping. (Newegg charges the same.) That's tied with our mention from last week as the lowest total 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.
Also available is the SteelSeries Rival 300 Optical Gaming Mouse, model no. 62351, for $39.99 with free shipping. (Amazon charges the same for Prime members.) That's the lowest total price could find by $6. It features six programmable buttons, scroll wheel, 6.5-foot cord, and configurable resolution up to 6,500 cpi.