DealFisher via eBay offers the 4-lb. refurbished ASUS VivoBook Intel Haswell Core i5 1.6GHz 13.3" Touchscreen Laptop, model no. ASQ301LA-BSI5T17, for $449.99 with free shipping. That's $200 off list and the lowest total price we've seen for any ASUS VivoBook with 6GB RAM and a 500GB hard drive. It features an Intel Core i5-4200U 1.6GHz Haswell dual-core processor, 13.3" 1366x768 LED-backlit multi-touch LCD, 6GB RAM, 500GB hard drive, 802.11n wireless, webcam, USB 3.0, HDMI, 2-cell battery, and Windows 8.1 64-bit. (It doesn't have an optical drive.) Deal ends September 15.
A 90-day warranty applies, although it's not clear who backs it.
Update: Specs corrected.