Lenovo offers its Lenovo N3902A Wireless Mouse in Red, model no. 57Y6673, for $29.99. Coupon code "USP1JL546673" cuts it to $10.49. With free shipping, that's tied with our February mention and the lowest total price we could find by $10. This mouse features a 1,000 dpi resolution and USB dongle. It requires two AAA batteries (not included).