Today only, DealsClick offers the Microsoft LifeCam NX-3000 USB Webcam for $6.69 plus $4.99 for shipping. Outside of the price below, that's the lowest total price we could find by $3, although we saw it for $2 less in December (since expired). Features include a 640x480 resolution, 1.3-megapixel still pictures, automatic face tracking, and more.

A close price: Digital Media Source via Amazon has it for $12.38 with free shipping for Prime members.