Tell him to be careful and only buy from the larger retailers. There are a multitude of scams being run now. If they say they have everything in stock, it's fraud. Have you looked locally at Sportsmans and Gander?
What do they say, Go Woke Go Broke? Firearms are evil. It is never the shooter that is to blame.PayPal and eBay won't do guns or ammo, primers would count as ammo. Other gun related items are okay. I've done PayPal for parts, holsters, magazines, mag loaders. I've seen eBay parts lots that were entire guns, minus a frame or receiver, with PayPal payment. It makes no sense, they've missed a pile of green. I'd guess they are afraid of being sued for handling payment of a "mass shooter" gun or ammo.
eBay bought PayPal several years ago. Either without the other would cut their business way down.