I was offered half the value of my iphone X because of a 'black dot' on the lens, even though I have had the phone for over a year and not noticed any photo issues whatsoever. Subsequent to mentioning this in a fb review, I was contacted by other people who were also paid significantly less for the same issue. Customer services tell me its a very common issue they find that results in many phones resulting in them paying out about half. If you are looking to sell your phone you should consider this because theres a good chance you will get half the advertised amount. They also don't keep any proof of this issue, you have to take them at their word