Update (6/2 11:30am): Altatac (Top Rated Plus seller) via eBay Daily Deals offers a 64GB iPad Air WiFi for $579.99 shipped (Reg. $699)
Target offers free gift cards with the purchase of select iPads this week. If you pick up an iPad Air you will receive a $50 Target gift card, or a $20 card with a Retina iPad mini (which is already $30 below list). Target also has buy one, get one 30% off iTunes gift cards. Also, Red cardholders get an extra 5% off each item mentioned above from Target.