JemJem offers the refurbished 3-lb. Lenovo ThinkPad X1 Carbon Intel Haswell Core i5 1.9GHz 14" Touchscreen Ultrabook for $449.99 plus $1.99 for shipping. That's $53 under our September mention and $227 below the the lowest total price we could find for another refurb. Features include an Intel Core i5-4300U 1.9GHz Haswell dual-core processor, 14" 2560x1440 IPS LED-backlit touchscreen LCD, 8GB RAM, 256GB SSD, 802.11ac wireless, Bluetooth 4.0, 8-cell battery, and Windows 10 64-bit.
A 90-day warranty applies, although it's not clear who backs it.