I figure if you sell enough you see all of those.
My favorite was from early on, 1999 or so when things were new. I sold 5 or 6 cheap cards to someone. After about a week I sent a gentle reminder.
I got an email from the buyers girlfriend. She had set up an account for him, and apparently one night he bid on well over 1000 items nearly all cards. And won nearly all of them. She said they planned on paying but needed a bit more time as the total was more than he made in a month
I checked and he did have roughly a thousand items at $1-2 each plus whatever the shipping would have been, so probably around 5-6000.
I told them to take their time, just to pay eventually and let me know roughly where I was in line once in a while.
They paid the next week.
Steve B