I've noticed that when I do Searches on ebay, it defaults (for me) to search only auctions from USA ebay sellers. There are often good deals from people outside the US, or products not sold in the US, that you miss out on. So here's how to override the default and have the ebay search include International sellers.
1. Click on the "Advanced Search" link
2. Scroll down the screen and look for the Location area.
3. In the Location area click on the "From preferred locations" and select "Worldwide" from the drop down menu.
Your search will now include all ebay auctions worldwide.

I didn't see how to set this up to be the default for all my ebay searches. If anyone figures that out, let me know.