Lenovo Outlet offers its Lenovo N3903A Wireless Mouse in Metal, model no. 57Y6596, for $39.99. Coupon code "USP1SP26596" cuts it to $11.99. With free shipping, that's $4 under our July mention and the lowest total price we could find by $8. Sales tax is added where applicable. This mouse features a 1,200 dpi resolution, USB transmitter, and more. Two AAA batteries are required, but not included.