At Lenovo, search for "57Y6574" to find the Lenovo N3902A Wireless Mouse in Black, model no. 57Y6574, for $34.99. Coupon code "USP1M16574" cuts it to $11.99. With free shipping, that's pennies under our December mention and the lowest total price we could find. Sales tax is added where applicable. This mouse features a 1,000 dpi resolution, USB transmitter, and more. Deal ends May 7.