How to ship a pc safely

Hello so I am going to ship my pc around 100km from my town but idk how do I ship it safely it is ryzen 3 3200g and a320m but no gpu, how do I assure that when the buyer received the item it is completely safe, I have seen youtubers use some rubber or something inside the pc to avoid the shaking on the gpu but i dont have a gpu since my pc has already integrated any tips?