Drivengps via eBay offers the refurbished 4.6-lb. ASUS VivoBook S500CA Intel Ivy Bridge Core i5 1.7GHz 15.6" Touchscreen Ultrabook, model no. S500CA-DS51T, for $454.95 with free shipping. That's $45 below our mention of a refurb from two weeks ago and the lowest total price we could find by $45 for a refurb today. It features an Intel Core i5-3317U 1.7GHz Ivy Bridge dual-core processor, 15.6" 1366x768 multi-touch LCD, 6GB RAM, 500GB hard drive with 24GB SSD, 802.11n wireless, Bluetooth, webcam, 3-cell battery, and Windows 8 64-bit. (No optical drive is included.)

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