Tanga offers the refurbished 5.1-lb. Apple MacBook Intel Core 2 Duo 2GHz 13.3" Laptop in White, model no. MB061LL/A, for $139.99 with free shipping. That's $960 off and the lowest total price we've seen. It features an Intel Core 2 Duo 2GHz dual-core processor, 13.3" 1280x800 widescreen LCD, 2GB RAM, 80GB hard drive, DVD/CD-RW combo drive, iSight webcam, 802.11n wireless, Bluetooth, and Mac OS X 10.7 (Lion). Deal ends October 22.
A 90-day warranty applies, but it is unclear who backs it. Note that this item is in "Grade A" condition and may have scratches or show signs of minor wear.