Newegg offers the Razer DeathAdder 3500 PC Black Edition Gaming Mouse, model no. RZ01-00152400-R3M1, for $39.99. Coupon code "NAFSAVETENDEC6W" cuts the price to $35.99. With free shipping, that's the lowest total price we could find by $4. It features five buttons, a scroll wheel, and 3500 dpi Razer Precision 3.5G infrared sensor. Deal ends today.

Of note, Amazon offers the Razer DeathAdder 2013 PC Gaming Mouse, model no. RZ01-00840100-R3U1, for $41.99 with free shipping. That's the lowest total price we could find by $17, although we saw it for $7 less last winter. It features a 6400 dpi 4G optical sensor, five buttons, and illuminated scroll wheel.