Ebay should let you set up your account to only see countries you want to see from. In advanced search, you can do this but the only items it affects are the direct results of the search. Many other items on the page are not restricted to your search. This is a pain Ebay knows it and Ebay should fix it. They will not however because they are sellers, not buyers, and sellers could care less.

Default search USA for all of Ebay, Even items indirectly searched. | Ask a Mentor

Default search USA for all of Ebay, Even items indirectly searched. | Ask a Mentor | eBay Community