I may soon be selling a bass overseas as well. I've read pages and pages of eBay and PayPal info on seller protection and chargebacks.
It seems that if I have a tracking number and the buyer signs for the package, they can't claim that they didn't receive it.
If you ship to the VERIFIED address shown on the PayPal transaction details page, they can't claim credit card fraud.
So their only other scam option is to claim that what they received is not what they paid for. That one's a little harder for the seller to prove. Not sure how to prove that I actually shipped the bass I said I would and didn't substitute something else (same size, same shape, same weight, etc.).
My hope is that, based on the buyer's feedback, he seems to be a reputable instrument buyer, with a number of previous bass purchases, and 100% positive feedback.