Best Buy offers the Microsoft Wireless Mobile Mouse 3500 in Geode, model no. GMF-00017, for $9.99 with free shipping. That's tied with our May mention as the lowest total price we could find, this time by $16. (It's also tied as the lowest total price we've seen.) Sales tax is added where applicable. This wireless mouse features BlueTrack technology (which purportedly works on more surfaces than optical or laser technology), a nano transceiver, on/off switch, and more.