I traded my IPad Air 2 (WiFi 64GB Space Grey) in at Best Buy and received almost the same price for what you paid. Very Interesting! You are right, SmartSDR operated just fine on it. I do like running it on my IPad Pro better.
I am having problems with getting VPN to work with Ipad air 2 Using OpenVPN app connecting to my netgear R7000 router with built in VPN I only had it work sort once at a grocery store and it was slow. It won't connect at Public library at all , at two pirvate homes the VPN would connect but did not see the Flex 6500 , any ideas on what to try?