Today only, Staples offers the Microsoft Wireless Mobile Mouse 3500 in Black, model no. GMF-00030, for $9.99. Plus, Staples Rewards members qualify for free shipping. (Not a member? Click here to sign up for free.) That's the lowest total price we could find by $9 and tied as the lowest total price we've seen for this mouse in any style. (We last saw it in a different style a year ago for $5 more.) This wireless mouse features BlueTrack technology (which purportedly works on more surfaces than optical or laser technology), a nano transceiver, and on/off switch. It operates on one AA battery (included).