Apple quietly dropped the prices on refurbished MacBook Airs last night by up to $120. Notables above are 2010 releases of the 11.6″ MacBook Air model with options of 128GB SSD or 4GB of RAM. Apple refurbished items are virtually indistinguishable from new items and come with the same 1 year AppleCare warranty. All refurbished Macs purchased at Apple are also eligible for the OS X Mountain Lion Up-to-Date Program.
These typically run out of stock very quickly.
Update: All gone. You snooze, you lose.