I just changed my country of registration to the US from Canada . I have a US ship-to address,and do not require shipping out of the lower 48, but ebay recently started an auction setting that prohibits me from even bidding because I'm registered in a country to which the seller does not ship. At first I tried emailing sellers, guiding them through the permitted buyers process - then gave up & changed my country of registration to the USA.
I still live in Toronto, though.
Frank