I have had issues too with "PayPal". Always get a fault error and it takes forever to prove shipments etc. May be a coincidence but I do not believe in them. Others not just the OP have had the same thing and the only connecting factor is it is firearm related.
*I hope it is just a fluke but the past 6 months I have had issues on this matter. We have opted for now to limit the use of "PayPal" but they are sometimes the only option.