MacMall offers the 4th-generation Apple iPad with Retina Display 16GB WiFi + 4G for AT&T in White, model no. MD519LL/A, for $399.99 with free shipping. That's $40 under our mention from January and the lowest total price we could find today by $99. It's 9.4mm thick, weighs 1.4 lbs. and features a 9.7" 2048x1536 Retina display, A6X dual-core processor with quad-core graphics, 16GB internal memory, 5-megapixel iSight camera with 1080p video recording, 1.2-megapixel HD FaceTime camera, voice dictation, 802.11n wireless, Bluetooth 4.0, Lightning connector, up to 10 hours of battery life, and iOS 6.