Lenovo offers its Lenovo N3902A Wireless Mouse in Black, model no. 57Y6574, for $34.99. Coupon code "FLASHSALE574" cuts it to $10.99. (TigerDirect via Amazon has it for pennies more.) With free shipping, that's the best we could find by $4, although we saw it in another color for a buck less last week. This mouse features a 1,000 dpi resolution and USB dongle. It requires two AAA batteries (not included). Offer ends March 5.