The cheapest in the bunch is a Wi-Fi-only iPad Air with 32GB of built-in storage. It can be bought for $509, in either silver or space gray. Folks who need extra space on theirs are free to choose between a 64GB or a 128GB iPad, priced at $589 and $679 respectively.
4G-capable refurbished iPad Air units are also available at the online store. For $529 one can grab a 16GB iPad with cellular connectivity provided by AT&T. The 32GB and 64GB Wi-Fi + Cellular refurbished models, also powered by AT&T's 4G LTE network, cost $619 and $699 respectively.
All of Apple's certified refurbished iPads come with free shipping and a 1-year warranty. Furthermore, they are all thoroughly tested for reliability and equipped with a brand new battery and outer shell. Interested in grabbing one? Then follow the source link below.
source: Apple Store