As a buyer - The worst with buying have all been because of the USPS and Fedex guys mostly. My old mail man for 3 years was essentially the package Jesus. He was a demi god immortal. Beyond flawless. So nice and careful with his craft. The best
. But the sunday driver for amazon prime and the new mail man... not so much. More the leave a 500 dollar xbox one x on a porch in the ghetto without ringing the bell type. I fixed the new mail man by having a sit down talk with him by the fire with smores. I offered him propositions of sorts. He was a gracious person.
Outside of that, I have had amiibos shipped in bubble mailers arriving crushed by careless sellers. And 1 game that didnt work. A few crushed boxes. Sometimes things that stunk of pot. And one stolen camera because fedex left it on my porch and I was at work. I live in the 43rd most crime ridden city in the US. Tons of theft. Most sellers refund me instantly and ebay sides with the buyer on broken things but dtolen stuff is lost forever.
As a seller - Only 1 return knock on wood, he pulled the old swap on me. Really scammed me bad
I sold him a beautiful NES. Tested, loved and so clean. He took it, and messaged me with a chipped, yellow junk NES saying I shipped him the wrong one. I had no way of proving and ebay instantly sided with him. So now I have a junk scratched yellow dirty NES and lost 70 dollars. But it was a huge learning experience. Now I film the whole packaging proccess to prove and serial numbers so I know I am getting back what I gave.