[panda67]

Anyone have any suggestions or best and cheapest way to mail it back to them?

If not it'll just go USPS international.

 

[bixby]

usps international works fine. I sent stuff to China that way and it works fine. If you use your own packaging, I think you can add insurance. But I think with the small flat rate box you cannot. Also look into Express Mail international, a bit more but you can add insurance and get tracking.

But by far the cheapest is just plain old international.

Hope this helps.