Canon offers its factory-refurbished Canon EF 24-105mm f/4L IS USM Autofocus Lens, model no. 0344B005, for $530.78 with free shipping. That's $69 under our mention from Black Friday week and $169 under the lowest total price we could find for a refurb now. It features image stabilization and three aspherical lens elements and includes a lens hood and case. A 1-Year Canon warranty applies.