Tanga offers the refurbished 6.2-lb. HP Compaq 8510P Intel Core 2 Duo 2GHz 15.4" Laptop for $114.99 with free shipping. That's $115 off list and the lowest total price we could find. It features an Intel Core 2 Duo 2GHz processor, 15.4" LCD, 2GB RAM, 120GB hard drive, DVD player, WiFi, HDMI, 8-cell battery, and Windows 7 Home Premium.
Note: A 30-day warranty applies, although it's unclear who backs it.