Staples offers the Logitech MX Wireless Mouse, model no. 910-002896, for $29.99. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to sign up.) That's the lowest total price we could find for a new one by $10. (We listed a refurb for $5 less last week.) It features dual side buttons, laser tracking, and a Logitech unifying receiver.