PayPal as a gift. Protects both the buyer & seller.
PayPal as a gift has no inherent protection, even if it wasn't for gun related purchases.
If I remember correctly, Paypal was a company bought by (maybe even started as an independent by) eBay, which is also very anti-gun. I think I read eBay is planning to spin it off again. Either way, both are very anti-gun. Both will bounce your account and delay or refuse to transfer payment if they detect violation of their rules, gift or no gift.
I read through Paypal's legal explanation a few years back on their web site. Total BS. BY their definition, every company and person who made, transferred or even touched a firearm was liable if it was ever misused. Anti-gun BS.
I used Paypal once years ago for car parts from eBay before I knew. Never again. By no means are they the only anti-gun companies, but I do what I can to avoid antis when possible.
Regarding money orders, supermarkets, WalMart and most of the mailing service stores sell MOs, so you don't
have to go to the post office. The Kroger chain uses Western Union MOs.
I tell buyers I will expedite shipping if they send me a scan or phone pic of the MO before mailing. I also take a personal check with a few days clearing delay.
I find best way (as buyer or seller) is to send the MO in a USPS priority mail envelope. Two or three day delivery and has a tracking number.
If you're lucky enough to live way out there, stamp and an evelope.