I'm not sure I follow but it sounds like there are several factors in your favor. It also seems that the case is still under review by Reverb. Based on my experience, Reverb will side with you. If so, you shouldn't have to worry about PayPal.
Of course, you don't have to accept PayPal but it's not a realistic business model if you're an active online buyer and seller. I prefer to pay with PayPal because of the buyer protections.