Walmart offers the Apple iPad Air 16GB WiFi Tablet in Silver, model no. MD785LL/A, for $479 with free shipping. (Scroll down and see it on the left-hand side of the first row. Staples charges the same for Space Gray.) That's tied with last week's mention, $20 under what Apple charges directly, and the lowest total price we've seen for this newly-released iPad. 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, 10-hour battery life, and iOS 7.