As one of its daily deals, Best Buy via eBay offers the Razer Naga Ergonomic MMO Gaming Mouse in Black, model no. RZ01-00580100-R3U1, for $39.99 with free shipping. That's the lowest total price we could find by $32. It features 19 MMO-optimized buttons, a 12-button mechanical thumb grid, green LED backlighting, and 1,000Hz ultra polling. Deal ends today.