A possible price mistake, The Price Pros via Amazon offers this Microsoft Arc Touch Wireless Mouse, model no. RVF-00001, for $9.41. With $6.44 for shipping, that's $17 under our mention from last week and the lowest total price we've seen for this device. (It's also a current low by $17.) It features a nano receiver, flexible design, touch scrolling, and BlueTrack technology.