Bought it used from ebay and it's in great shape, but the screen and touchID/home button have marks on it from an otterbox case the previous owner used. It's most prominent around the earpiece where the otterbox has a triangle shape opening and a circle with a dot in the middle on the home button. They don't feel like scratches so I'm kind of confused why they won't wipe away... Otterbox is extremely popular so I'm hoping someone has some experience with this that can help out!