By default, the iPhone can be in the following states:
Perfect. This is exactly the case that we talked about above (you used protective glass and covers). The iPhone in perfect condition has no chips, scratches or scuffs.
Good. There are slight visual traces of use: minor scratches and abrasions. The screen is undamaged.
Damaged. In such an iPhone, the flaws are more noticeable: chips, cracks, dents, and certain functions may not work.
It all depends on the model, year of manufacture and the actual state of the gadget. If you used the iPhone as carefully as possible, used protective glass and covers, then it is more likely that you will be able to sell it at a bargain price using the service https://gadgetpickup.com/product/iphone-8-plus/ . There I sell iphone 8 plus, so I recommend them