First, there's a world of difference between "I know how to reasonably handle a cash sale without fear of armed robbery" and "this person might be petty or weird enough to try and screw with things when they're unhappy/regretful/drunk etc".
Secondly, as I keep saying, this is actually the reasonable and smart take:
Quoted from luckymoey:I’m happy to take electronic payment from people I know or well established Pinsiders for smaller transactions, maybe up to couple grand. But for larger ones I don’t want the Gov’t potentially getting involved in, or even knowing about, my pinball fun.
I'm selling $1500 Tron toppers to people right now, through PayPal. Without a worry. I take electronic payments for all my mods. And I'm going to pay taxes on it all, my mods are a side business. The books are all legit and aboveboard.
Me moving games in and out of my collection isn't business. I don't have receipts worth a damn for anything I didn't buy NIB, and have no desire to try and track that sort of thing once it's on record if I get audited, or the new reporting laws finally kick in on anything over $600 a year.
That's not being paranoid, that's just common sense. When people start getting 1099-Ks for their pinball sales they're going to start thinking twice.