Right now, Apple’s online store is offering refurbished MacBook Air models at low prices, with five configurations landing at sub-$1,000 price points. The refurbished 11.6-inch MacBook Air with a 1.3GHz Intel dual-core i5 processor, 4GB of RAM and 128GB of flash storage has been reduced by $130 down to $719. A refurbished 13.3-inch MacBook Air, originally released in June 2012, with a 1.8GHz Intel dual-core i5 processor, 4GB of RAM and 128GB of flash storage has been cut by $420 to $779….