Hello. I would like to get a used iphone for my wife. I would like to get the new style introduced with iphone X, so I am between X, Xs, 11 and XR. I am leaning towards Xs due to price/features. Is there anything I should be looking for/avoid? Except for the obvious, no icloud lock, battery percentage (the ones I find are between 85-90%), accessories included and cosmetic condition? Thanks.