The iPhone X, like all models, is a different model than all the others; the maximum price for one model is not going to be the maximum price for another.
> Apple sets prices based on a 30% raw profit margin and ignores the market except as it constrains their raw material and manufacturing costs.
Literally impossible ahead of time, as some of their costs are fixed rather than marginal. If you spend, as they did last year, ~$34.5bn on R&D, and you make a thing that costs $1000 to make and then you price it at $1300, but the market looks at what it is and what it costs and says "nah" so only 1 million people buy it that year, then what you're actually making isn't a 30% profit, it is a loss >110x your revenue.
We don't know exactly how much R&D was spent on the AVP, nor the exact sales, but the market reaction to the price is something you should have in mind. No matter what its unit economics were, Apple probably made a loss overall.