I need advice from those who are in the know...

I have a 3 year-old flashlight which died on me when I accidentally dropped it getting out of the car. Long story short, the company in China is going to replace it, free of charge, and will likewise cover the return shipping. They've already issued me an RMA and I only have to bear the cost of shipping to China.

Using DHL or FedEx is out of the question.

1. What are my options?
2. If I use regular postal service, what does the process look like?

Thanks!