That's fair enough. What isn't fair is to assume that you will have problems with buyers and sellers in any other country but your own. That is clearly nonsense.
This is why I hate the words 'US only' on a sale just as much as someone else might hate seeing 'UK only' for an item. The reality is that it's easy to post to a different country and the chances of anything going wrong or for a buyer or seller to cause problems are equal domestically as they are overseas.