AltaTac via eBay offers the Apple iPad Air 64GB WiFi Tablet in Space Gray, model no. MD787LL/A, or Silver, model no. MD790LL/A, for $579.99 with free shipping. That's tied with our mention from four weeks ago as the lowest total price we've seen for this 64GB tablet. (It's also a current price low by $56.) 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.