used phone

Hi there, someone can tell me where i can used iPhone in USA, i want order it from another country for my phone store. Thanks

Hi people, i want to buy a LG V20 or V30 (i am not decided yet) but because my budget i think buying it used on eBay, do you think it's worth it buying it used or not? i don't care really about scratches and things like that, i am only worried about the durability and functionality of the phone...