Today only, MidnightBox offers the refurbished Apple MacBook Intel Core 2 Duo 2.1GHz 13.3" Widescreen Notebook, model no. MB061LL/A, for $409.95. With $3.99 for shipping, that's $540 off and the lowest total price we could find for this model MacBook with these specs. (We saw a refurb of this model with less RAM and a smaller hard drive for the same price in October.) It features an Intel Core 2 Duo 2.1GHz dual-core processor, 13.3" widescreen LCD, 2GB RAM, 160GB hard drive, DVD burner, Bluetooth 2.0, 802.11n wireless, Gigabit Ethernet, webcam, and Mac OS X 10.6.

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