I bought a used ipad mini from greengadgets.net.au. They were great to deal with (no affiliation with them, just excellent service).
They grade the condition of their devices. I can't recall exactly which condition they graded the one I purchased as but it was one or two grades below perfect. And honestly, it was in brand new condition. Not a blemish on it.
I got the 128gb version as I figured I could use the ipad to take photos, record videos and run various other programs while on the road. And THIS is why I didn't consider HEMA's proprietary system. I paid less than I would've if I bought the HX-1 for a tablet that does a whole lot more.