Hi Luis,
There isn't such a thing as an International eBay account unfortunately, however you can set your shipping options to "worldwide" when listing and your item will then show up in other countries for buyers to see. That said, it's up to the buyers in other countries to set their search criteria to view items outside of their own country.
So in essence there is no guarantee that you will reach everyone, you will only ever reach those in the country where your account is and in countries where buyers set an international search parameter and not sick to a national parameter or even smaller by setting distance.
You can read more here
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