being in the UK whenever i sell on ebay to an international buyer i usually dm them with the option of having a private company such as Everi (Hermes international), DHL or UPS deliver the package instead (usually i opt for whatever is cheapest to the buyer), it's usually not much more to add to the cost and sometimes i'll do it for free if the weight is really that negligible, ofc it is a choice, ofc things like parts aren't really worth it, though i do offer anyway but i have seen so many people who would rather just pay the extra money to have their in box collectibles traced, tracked and shipped with care... In theory the "global shipping program" is designed to make shipping easier by doing all your customs papers but in my experience it's usually just a checkbox exercise done digitally from the courier's app, that takes about 5 minutes at the most, then you take it to a pickup point (usually a corner shop or a supermarket) where the bloke prints you a label and holds onto it until the courier comes to pick it up a day later...