Best Buy offers the Apple iPad Air 64GB WiFi + 4G Tablet for AT&T in Space Gray, model no. MF009LL/A, or Silver/White, model no. MF012LL/A, for $499.99 with free shipping. That's $199 under our June mention and the best price we've seen. (Not only is this a current price low by $105, but it's also $39 under what Apple charges for a refurb.) 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.

Delivery is not guaranteed in time for Christmas, although orders placed with standard shipping today, December 16, are estimated to arrive by December 23.