When shipping overseas there are a few important things, getting money first is one, and what you put in the box that says what it is. Can't remember off the top of my head I got up at 5 and had a long day, but basically the general genera of what's in the package.
Basically you don't want it to hang up in customs, so you can't say it's something someone is paying you for. Or it'll be an issue, someone will end up paying taxes on it. I usually either put "gift" or if I'm sending it to somewhere like Iceland or Norway, if it's an expensive item I'll put "sample merchandise" and it'll get through without any issue.
Just make sure you make it look nice. Cut off the ends of all the wires, tape them up, etc. Make it look legit like something that's not a used item you're selling to someone... Good luck. If you want help with it just ask.
I have friends all over the world, and I've lived all over the world so I've done a lot of international shipping.