The two Walmarts near me have a ton of iPads on clearance. There were different versions of iPad Air 2, Mini 4, and Pro 9.7" and 12.9". I imagine this is extreme YMMV? Oh also AMEX $10 credit if you have it.
I got a Ipad Pro 9.7" 32gb Cellular for $459 – $10 AMEX = $449.
http://brickseek.com/walmart-inve…u=545942
http://brickseek.com/walmart-inve…u=510483
Best of luck!