Apple is now selling refurbished Macbook Air models that start at as low as 759 dollars for the refurb. For that money, you get a 11.6 inch Macbook Air with an Intel dual core i5 processor, 2GB RAM and 64GB flash storage. If that does not incites you and you are ready to shell more, you can get same Macbook Air but with 4GB RAM and 128GB SSD for 850 dollars.
For 930 dollars, you get a bigger 13.3 inch Macbook Air that comes with Intel dual-core i5 processor, 4GB of RAM and 128GB of flash storage. Oh, and for 1060 dollars, you get a Core 2 duo processor humming at 1.86GHz, 2GB RAM and 256GB SSD.
That way you will be able to save upto 210 dollars on a refurb. Nice. Just make sure the model you are buying supports OS X Lion.