"Cash on the glass" is the pinball standard; it really does protect both buyer and seller.

As a seller, I'll also (grudgingly) allow for them to arrange transport, if the buyer's willing to use escrow.com. I'll strongly encourage a video chat to address any possible concerns with the game before it's transported, and give them *every* possible chance to inspect. I actually WANT you to see every flaw! But once it leaves my house, deal's done.

I'll never do paypal for anything other than a small deposit if someone wants me to hold the game for a few days.

https://pinside.com/pinball/forum/topic/how-to-not-get-ripped-off-in-pinball-vids-guide

I'll take PayPal - for a small deposit to hold for an agreed number of days, applied towards the purchase.
I'll take PayPal when splitting the bill for a meal, and I "win" at Credit Card Roulette.

For a pinball machine, there are <10 people I'd take PayPal from - people who are well known to me, who have a very positive reputation, and who stand to lose by calling them out for welching on a payment. "In God We Trust - All Others We Take Cash." If that means waiting until I sell to someone else, so be it. If that means lowering my price to deal with a closer market, so be it. It's just not worth gambling that someone's not gonna be a jerk with thousands of dollars at stake.