The Apple Store discounts a selection of its factory-refurbished MacBook Air laptops, with prices starting from $639. Plus, all orders qualify for free shipping. Each system carries a 1-year Apple warranty (the same as new units). A couple of best bets, with comparisons against the best price for new units:

• Refurb Apple MacBook Air i5 1.3GHz 11.6" 128GB SSD for $639 (low by $240)
• refurb Apple MacBook Air i5 1.4GHz 13.3" 128GB SSD for $759 (pictured, low by $90)