Everybody is free to sell or not to sell to wherever they like or not, if you ask me. In several cases where my country was excluded, I asked the seller as kind and considerate as I could and more often than not, they agreed to sell to me anyway.
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.
If junk yards and charity shops count I will add these two gems a $10 Vitessa from a junk yard in Manjimup and a $30 Retina from a Charity shop in England
I also have a Leica M2, but that was given to me free and has cost more in repair bills than a new one machined from a block of platinum
For example, when a theft or fraud has been committed on a domestic sale it can be referred to domestic police agencies. But, when such a crime is committed with an international sale the seller's options are drastically reduced. For all intents and purposes there is nothing a seller can do in such a case.
After a seller has lost his merchandise and money to such fraud a few times he/she tends to stop selling internationally and to laugh at the ignorant buyers who assume it is because the seller has something against their country.
Although I've shipped all over the world without a problem, part of the problem in overseas shipments is filling out the paper work required and making a trip to the post office when they are open. I'm about two gallons of gas away from a post office. Items shipped in the USA can be dropped in the self mailing box when I'm in town for another reason. Small (inexpensive items) are not worth the trouble to ship overseas. Bill Barber