I've been seeling quite a bit of stuff over the last year on ebay.
I only ship to the U.S. unless someone contacts me from another country and asks to bid.
I only accept paypal.
Only one time did someone complain about a item and he sent it back (a $50 item so no big deal)
Watch what you put for shipping because shipping costs can kill you.
I will say ebay is quite different from when I used it a lot 6 years ago. It's now mostly a bunch of Buy It Now items that are priced four times what they should be.