Woot offers the open-box 3.9-lb. Vizio Thin + Light Intel Ivy Bridge Core i7 1.9GHz 15.6" 1080p Ultrabook, model no. CT15-A5, for $539.99 with free shipping. That's $549 less than the lowest total price we could find for a factory-sealed unit and the best deal we've seen for this model. It features an Intel Core i7-3517U 1.9GHz Ivy Bridge dual-core processor, 15.6" 1920x1080 (1080p) LCD, 4GB RAM, 256GB SSD, 720p webcam, 802.11n wireless, Bluetooth, USB 3.0, HDMI, and Windows 8. Deal ends April 16.

A 30-day Woot warranty applies.