As one of its daily deals, Amazon offers the Logitech Wireless Performance Mouse MX, model no. 910-001105, for $44.99 with free shipping. That's tied with last month's mention and the lowest total price we've seen for a new unit. (It's a current price low by $12.) It features four thumb buttons, scroll wheel, and Logitech unifying receiver dongle that allows the addition of a compatible wireless keyboard without multiple USB receivers. Deal ends today.