Staples offers the Apple iPad Air 16GB WiFi Tablet in Space Gray, model no. MD785LL/A, for $499. Coupon code "79449" cuts it to $399. With free shipping, that's a buck under an expired mention from earlier today and the lowest total price we've seen. (It's a current price low by $49.) This 1-lb. tablet is 0.29" thick and features a 9.7" 2048x1536 Retina display, Apple A7 64-bit processor, M7 motion coprocessor, FaceTime HD front-side camera, dual microphones, 5-megapixel iSight camera, 802.11n wireless with MIMO, Lightning connector, up to a 10-hour battery life, and iOS 7. Deal ends August 16.