I figured if the iPhone Xs would sell at $900 (with the Xs Max starting at $1000), then last year's X should technically be $800 brand new (although it would simply be discontinued by Apple but stores like Best Buy would sell the older model for $100 cheaper). I thought since last year's X would then be devalued automatically by $200, $600 sounded possible to pick up a used X but now I think the market will hold at $700.