Newegg offers the refurbished 3.1-lb. Asus Zenbook Intel Haswell Core i7 1.8GHz 13.3" 1080p Touchscreen Laptop, model no. UX31LA-DS71T, for $539.99 with free shipping. That's $559 under the lowest total price we could find for a new unit and the best price we've seen in any condition. It features an Intel Core i7-4500U 1.8GHz Haswell dual-core processor, 13.3" 1920x1080 (1080p) LED-backlit touchscreen LCD, 8GB RAM, 128GB SSD, 802.11ac wireless, webcam, Bluetooth 4.0, 6-cell battery, and Windows 8.1 64-bit. (No optical drive is included.)

A 90-day warranty applies, although it's unclear who backs it.