Ya It looks like they are going for over 800 minimum on Swappa, so I'd imagine after the new ones come out I can still get 700 or so.You will get more then that, I got 600 for my 256 7+ with apple care last year and I sold it way late. I sold my 256 X a week ago with no apple care + for 870.00
What I'm worried about is the $700 iPhone Apple has coming out. If it's the same guts as an X with a bigger screen and brand new (LCD not oLED) that may kill the used X market...