Amazon offers the Logitech Wiresless Anywhere Mouse MX, model no. 910-003040, for $30.98 with free shipping. (Select "Amazon Frustration Free" packaging to see this price.) That's $4 under our Black Friday mention of an older model of this mouse and the lowest total price we could find now by $4. It's compatible with both Windows and Mac, and features laser tracking, scroll wheel, thumb buttons, 2.4GHz wireless connectivity, micro USB dongle, and carrying pouch. It requires one AA battery (included).