Best Buy Computing Clearance offers the previous-generation, 2.3-lb. Apple MacBook Air Intel Core 2 Duo 1.4GHz 11.6″ LED-Backlit Laptop, model no. MC506LL/A, for $669.99 with free shipping. That’s $39 under our mention of a refurb from a week ago (this model is new) and the lowest total price we’ve ever seen for this model. (It’s a current price low by $49.) Sales tax is added where applicable. It features an Intel Core 2 Duo 1.4GHz dual-core processor, 11.6″ 1366×768 LED-backlit LCD, 2GB RAM, 128GB SSD, NVIDIA GeForce 320M graphics, Bluetooth, integrated webcam, DisplayPort, up to 5 hours of battery life, Mac OS X Snow Leopard with iLife ’11, and more.