Asus Zenbook UX31A-R5102F 3rd Gen i5 13.3" Ultrabook $650 at Rakuten.com Shopping

Update: The price has now been raised to $650 with free shipping.

Buy.com has the refurbished Asus Zenbook Prime UX31A-R5102F 3rd Generation Intel Core i5 128GB SSD 13.3" Ultrabook Notebook for $618 with free shipping. The UPC listed is 00886227219735, which matches the UX31A-R5102F. Measures only 3mm thick in the front and 9mm thick in the back.

Intel Core i5-3317U 1.7GHz, 4GB RAM, 128GB SSD, USB 3.0

UMA Graphics, Bluetooth 4.0, 802.11b/g/n, Win 7 HP x64