Today only, Amazon offers the Logitech Anywhere Wireless Mouse MX in Black, model no. 910-001637, for $33.99 with free shipping. That's tied with our April mention and the lowest total price we could find now by $26. 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 two AA batteries (included).