Staples offers this Microsoft Bluetooth Laser Notebook Mouse 5000, model no. 69R-00001, for $19.99 with free shipping. That's the lowest total price we could find by $7, although we saw it for a buck less last winter. Sales tax is added where applicable. This Bluetooth-enabled laser laptop mouse is transceiver-free and features an ambidextrous design, back button, and battery indicator. It requires two AAA batteries (not included). Deal ends October 15.