MegaMacs offers the refurbished 2.4-lb. Apple MacBook Air Intel Core i5 1.6GHz 11.6" LED-Backlit Laptop, model no. MC968LL/A, for $399.99 plus around $20 for shipping. That's $59 under the cost of used unit with 4GB RAM elsewhere, although we saw this same one for $10 less last week (since expired). It includes an Intel Sandy Bridge Core i5-2467M 1.6GHz dual-core processor, 11.6" 1366x768 LED-backlit LCD, 2GB RAM, 64GB SSD, AirPort Extreme (802.11n wireless), Bluetooth 4.0, Facetime camera, USB, Thunderbolt, and Mac OS X. (No optical drive is included.) Deal ends September 9.

A 30-day MegaMacs warranty applies.