The Apple Store offers the factory-refurbished 2.4-lb. Apple MacBook Air Intel Core i5 1.6GHz 11.6" Widescreen Notebook, model no. MC968LL/A, for $829 with free shipping. That's tied with our mention from three weeks ago and the lowest total price we could find for a refurb with a full factory warranty. (It's currently $110 under the best price we could find for a new, factory-sealed unit.) Sales tax is added where applicable. It features an Intel Core i5 1.6GHz Sandy Bridge dual-core processor, 11.6" 1366x768 LED-backlit display, 2GB RAM, 64GB SSD, AirPort Extreme (802.11n wireless), Bluetooth 4.0, Facetime camera, Thunderbolt port, and Mac OS X 10.7 Lion. A 1-year Apple warranty applies.

Don't mind a weaker warranty? Geeks.com has a refurb for $789.99 with about $20 for shipping, but only with a 90-day Geeks warranty.