ok, personal info removed..!
I don't like that I have to send him the bag without before a refund from his part. but I opened a claim, this have a worth, I think...!!
The claim is why the seller is answering. I was reviewing Ebay.FR and Paypal.FR and it is the same as the US. You are protected.
Ask the vendor why it is a different address. Is he contacting you thru Ebay messaging?