Thats absolutely rubbish isnt it. I pay nearly £1000 for a 256gb iPhone 7 Plus and it will lose lots of value now through no fault of my own.
Not really...most gadget purchasers (Envirofone, Mazuma Mobile, Carphone Warehouse) don't deduct value due to cosmetic damage. They're only bothered about serious damage and anything that affects the functioning of the device. They're highly tolerant of scratching, blemishes and, in most cases, chipping.
[doublepost=1503588190][/doublepost]I had a transparent hard case on my black 7 Plus for a few months, and the antenna bands are all scratched up in much the same way. Luckily the aluminium itself came out unscathed. I use Apple's silicone case now, I never realised how useful the microfibre lining was until now - it avoids this very issue by trapping lint.