Retrevo offers the refurbished Apple MacBook Intel Core 2 Duo 2.16GHz 13" Widescreen Notebook, model no. MB062LL/A, for $499.99 with free shipping. That's $110 under our January mention of a refurbished unit with a smaller hard drive, and it's the lowest total price we could find for this system with these specifications today by $56. It features an Intel Core 2 Duo T7400 2.16GHz processor, 13.3" 1280x800 widescreen LCD, 2GB RAM, 160GB hard drive, SuperDrive, Gigabit Ethernet, iSight webcam, AirPort Extreme (802.11n wireless), Mac OS X 10.4 Tiger, and more.

A 90-day warranty applies, although it's unclear who supports it.