Tekdeals via eBay offers the refurbished 2.4-lb. Apple MacBook Air Intel Ivy Bridge Core i5 1.7GHz 11.6" Laptop, model no. MD223LL/A, for $354.95 with free shipping. That's the lowest total price we could find for a refurb by $15 and the best deal we've seen for this model. It features an Intel Core i5-3317U 1.7GHz Ivy Bridge dual-core processor, 11.6" 1366x768 LED-backlit LCD, 4GB RAM, 64GB SSD, 802.11n wireless, Bluetooth 4.0, Facetime camera, Thunderbolt, USB 3.0, and Mac OS X 10.10 Yosemite.
A 30-day warranty applies, but it's unclear who backs it. These units will have visible dings and pressed corners.