I was able to find a genuine mint/sealed iPhone XS applecare replacement unit. I feel they are still there, just have to look and filter more carefully.Problem is that the only other source of near decent older phones is Swappa. However their standards seem to be slipping. Mint used to mean just that - now it includes battery life of 85%(??) and I've even seen a seller claiming a mint phone with only "minor" scuffs/scratches on the screen??? And of course Apple knows that and sets their prices accordingly - so in order to even get to par with an Apple refurb you probably have another $100 for a new battery.
But yeah, I bought a "mint" XS Max for my father last year, and it had noticeable scratches on the back of it. I feel like most people would overlook it but I saw them when looking at it carefully in a well lit room. He didn't really care, but I think they need a serious definition overhaul of mint condition.