Chosen Solution

Lets say I am building a iphone (13) from spare parts from ebay, would I be able to buy a Housing with small parts included (vibrator, speaker, buttons, all cables already in it with screw ) and logic board with the front camera sensers, a screen with the proximity sensors, a oem battery, an earpiece speaker, and the rear facing camera(s) as well as the oem brackets. Would the phone turn on at all?

you can buy most of the parts but you will have issues with the camera, the screen and battery will also give warning messages because some parts are serialized to the logic board