newegg offers the GIGABYTE Wireless Notebook Optical Mouse, model no. GM-M7700, for $15.99. This $6 mail-in rebate chops it to $9.99. With free shipping, that's the lowest total price we could find by $7. This 3-button mouse features 4-directional scrolling, 1600 dpi, and a USB receiver that plugs into your laptop. Rebate ends August 31.