There are several cash transfer apps in widespread use now: venmo, Apple Pay, cashapp, zelle. These are all secure ways to send money for free or, if you want to pay instantly, for a small sum. Cheaper than PayPal, and less hassle.
All that may be true but i will bet you the great majority of the American population has never heard of those payment sites.
I never have, as I'm not a millennial.
Everyone's heard of Pay Pal.
Whatever problem you might have had with them in the past, probably best just to suck it up, and accept Pay Pal.
Open up a new account with them, just exclusively for parts sales payment.
