I have always wondered how many iMac problems was caused by the harsh treatment of the delivery carriers. In my past 40 years buying electronic items for my personnal use at my home, I have used USPS, FedEx, UPS, DHL, etc. I have only had to return one package (shortwave radio) that was delivered by USPS which I refused delivery (big whole in package and some rattling noise when I shook it).
Where I use to work (fed government site) dozens of deliveries every day by the big name carriers I would see every day how they would actually toss the individual large packages on the loading docks from the back of the trucks. Many packages which contained electronics. Which is why I will buy my new iMac from the Apple Store which is only 5 miles from my home. When Apple Store gets there items they are delivered in large quantities on a wooden plat and completely wrapped in plastic. Forklift is used to unload from truck to store delivery area. This way less chances of badly handle merchandise and also the Apple people checks this delivery very carefully to make sure there is no physical outside damage to the cartons before they except the delivery.