iPad Air 2 models are fast approaching 5 years old, now!
Also, buying used devices from an unknown source can be very risky. Many people searching for a “deal’ get iPads that are permanently locked with user activation lock that, in the majority of cases, cannot be removed, defeated or circumvented.
I would pass on these.
Amazon, itself, currently sells new, sealed in box, Apple's base model 2019, 7th gen, 10.2 inch screen, WiFi ONLY 32 and 128 GBs iPad models selling for $279 and $359, respectively, through its own direct sales distribution.
This is a $50-$70 savings from Apple's own pricing of these iPad models.
https://www.amazon.com/gp/product/B07XQYPM2N?pf_rd_p=ab873d20-a0ca-439b-ac45-cd78f07a84d8&pf_rd_r=6HW54HFD0YSC2ZE3CP7Z
Amazon will also provide for purchase of extended, AppleCare+ product warranty protection plan, also.
The 2019, 10.2 inch screen 7th gen iPads have a 1/2 inch larger retina screen, much faster and newer 2.3 Ghz, A10 Fusion processors, 3 GBs of internal RAM, iPadOS 13 support, with much better and improved multitasking features, Apple Pencil and Apple Smart keyboard cover support and have better audio speakers and better/improved built-in cameras.
Best of Luck to You!