Ending today, Lenovo offers the Lenovo N6901 Bluetooth Laser Mouse, model no. 57Y6464, for $39.99. Coupon code "USP1MA436464" drops it to $11.99. With free shipping, that's tied with last week's mention as the lowest total price we've seen. (It's a current price low by $35.) Sales tax is added where applicable. Features include a 1,000 dpi sensitivity, laser tracking, and more. It requires two AA batteries.