If it's not shipped directly from the manufacturer or directly from Amazon (and not "fulfilled by Amazon", that's a different thing) assume it's a fake or used item. There is an entire industry both when it comes to counterfeiting electronics and when it comes to recycling a used (or even stolen) electronics to "new" status. I had supposedly "new" and "factory sealed" HTC One M8 phones ship with a Windows Mobile manual from an HD2 (all of them from high-rated Amazon sellers and fullfilled by Amazon). There is an entire industry when it comes to re-selling old sound card chips and old RAM modules and cloning them (but selling them as geuine made from Yamaha or Samsung accordingly).
It's also why so many Chinese phone resellers are butthurt from a recent Apple decision which closed a loophole which allowed iPhones to have their device lock removed by entering service mode, because it makes it harder to flip stolen iPhones as refurbs or even new. You see, it's easy to ask the legitimate owner for the unlock code but very hard if his iPhone was stolen from them.
Biting the hand that feeds IT
