It can be costly sending internationally, but you know that going in. But whatever you think is best. Anywhere in the US to anywhere in the US is fairly reasonable under $5. It cost me $16 to send to Canada, which was the same as sending to Greece for me. I don’t have a good solution, but tracking is available on all packages from the US unless you are a cheap fuck and send it regular mail which chances are is never getting to it’s intended person.