I had something like that happen to me one time. I sold a Dutch HT figure to someone living in Australia or the UK... can't remember.. I sold it through ebay and shipped it on time. I gave him the customs number, and after a few weeks he said it didn't arrive. He opened a dispute, I gave ebay the information I had... the customs number and the date of the mailing.
Ebay ended up ruling on his side... I had to refund him the full cost of $180... AND I lost out on a figure I didn't want to sell in the first place. The worst part was that it was a moment of great financial need, and by the end of this whole ordeal I was in the hole 200 bucks.
What a disgusting story. This is my big fear about selling which I only do out of financial need, not as an actual wage-earner. Not only to get ****ed on it, but for it to be on a figure you would rather have kept. Thankfully it hasn't happened to me..yet.