Meritline offers the factory-refurbished Logitech MX Wireless Mouse, model no. 910-002896, for $27.99. Coupon code "MLCH13JN" cuts it to $21.99. With free shipping, that's $3 under our October mention of a refurb and $13 less than the lowest total price we could find for a new unit. (We saw a new one for $30 shipped last month.) It features dual side buttons, laser tracking, and a Logitech unifying receiver. A 90-day Logitech warranty applies.