MegaMacs offers the refurbished 5-lb.MacBook Intel Core 2 Duo 2GHz 13.3" Widescreen Notebook, model no. MB881LL/A, for $499.99 plus around $19 for shipping. That's the lowest total price we could find for a refurbished unit by $33. It features an Intel Core 2 Duo 2GHz dual-core processor, 13.3" 1280x800 widescreen LCD, 4GB RAM, 120GB hard drive, Airport Extreme (802.11n wireless), Bluetooth 2.1+EDR, NVIDIA GeForce 9400M 256MB video card, and Mac OS X 10.7 Lion. Deal ends July 25.

A 30-day MegaMacs warranty applies.