Other World Computing discounts select used Apple MacBook Air Laptops, with prices starting from $519. Plus, all orders qualify for free shipping. Each item is covered by a 90-day OWC warranty. (Some items may carry additional AppleCare coverage.) Note that for some models, available quantities may be limited. A couple best bets:

• Used Apple MacBook Air Intel Core i5 1.7GHz 4GB 128GB SSD 13" Notebook for $519 (pictured, $780 off)
• used Apple MacBook Air Intel Core i5 1.7GHz 4GB 480GB SSD 13" Notebook for $828 ($671 off)