Staples trimmed its price on the Microsoft Explorer Touch Mouse in Black, model no. U5K-00001, for $11.99. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to sign up; otherwise, shipping is $9.95. In-store pickup is also available.) That's the lowest total price we could find by $5. This wireless mouse features 1-touch scrolling, BlueTrack technology, five customizable buttons, and up to an 18-month battery life.