Lenovo offers its Lenovo N50 Wireless Mouse in Black, model no. 0C41072, for $29.99. Coupon code "USP1SP341072" cuts it to $8.99. With free shipping, that's tied with our August mention as the lowest total price we've seen for this mouse. (It's also a current price low by $8.) It features an optical resolution of 1,000dpi.