Hello. Because of budget limitation I am buying a Dell xps series 13 9360 R3905S laptop from a second hand app in China. But according to seller the laptop was bought on November 2018 and hasn't been unsealed yet . I checked the service tag on official website and everything was fine . I am thinking to ask him for 7 days no reason return condition. Can anyone tell me, how can I confirm that the all components and hardware used in the laptop are genuine ? It will save my big money . thanks in advance