eCOST offers the refurbished Logitech MX Performance Laser Mouse, model no. 910-001105, for $41.99 plus $5.99 for shipping. That's $12 under our September mention of a new one and the lowest total price we could find for a refurb by $2. It features four thumb buttons, a scroll wheel, Logitech unifying receiver dongle that allows the addition of a compatible wireless keyboard without multiple USB receivers, and more.

Note: A 90-day warranty applies, although it's unclear who backs it.