PayPal sure is handy.
I've paid by money order, and it is a hassle for me.
I'm willing to pay the extra fees for PayPal, and also really love the extra protection.
Not a deal breaker for me from a known maker with good history of delivery.
Heck....I once sent a firearm in trade to an established maker (to his FFL of choice) So I obviously am willing to trust a known maker. Shipping a gun was way more hassle than just grabbing a money order.