--- I pack very securely and ensure safe arrival protecting the game box and securing the contents as well, I pack to prevent crushing, dings, impacts etc (I’ve personally collected all kinds of boxed games and have packed and shipped for over 2 decades, and as someone who has also bought a lot of games online in the past I know how frustrating it is to receive a damaged item due to poor packing).
--- International Shipping: I exclusively use the Ebay Global Shipping Program, the buyer pays for the cost of domestic US shipping to the ebay global shipping center and also pays the cost of international shipping (ebay also collects any VAT/custom fees, ebay charges the actual USPS international shipping cost that you would pay if shipped directly from the seller). Ebay guarantees the shipment and provides tracking to the point of delivery, and because the VAT is collected by Ebay, packages I understand are expedited through customs so they in general arrive faster.
--- International COMBINED Shipping: because I use the ebay global shipping program I am blocked from sending any kind of invoice to the buyer, I cannot actually combine or change the costs in any way. However, I always refund excess combined US Domestic shipping cost paid. Ebay does combine shipping on multiple items, my understanding is the weight of each item is added together for the total weight, I’ve also never encountered a situation where there was dimensional shipping costs as a result of combined ebay global shipping.
--- International Buyers with a domestic US shipping address: if you live outside of the US and make offers on items, let me know if you have a US address registered with ebay (I have to ship to the address used when you make the payment, no changes can be made). The reason I mention this is sometimes I will receive multiple offers and if I see the buyer is registered outside of the US, I typically may hesitate because I don’t know if the buyer has had experience with the Ebay Global Shipping Program (so knowing it’s going to be shipped in the US makes it much easier to combine US shipping and have a trouble free shipping charge).