Long story short - I agreed to send a sat nav to the States as I didn't realise I had to block international bidders, not just put UK only on the listing.
I sent it international signed for. Buyer has sent me a message saying it hasn't arrived and can he have my address. I have replied with a screenshot of the tracking page saying delivery was attempted but he wasn't there and he needs to arrange for re delivery or collection.
I'm starting to get nervous this is a scam, but he's paid, but I can't see why he wants my address? Any ideas? Is there anything more I should do?