I really dont think he scammed you, he's a regular here
Stuff happens in real life, I just sold a head unit on ebay, the auction ended 2 weeks ago and I gave the package to the post office a week and a half ago.
I work 2 jobs so it's seriously difficult for me to get to the post office between 9am and 5pm, and so yesterday was the first day I was in since.
The post master immediately handed me my package from a week and a half ago and said there was a problem with the postage and my payment didnt go through for some reason, so he kept it... we dont have mail delivery in our small town so he couldnt just send it back to the return address, we have to pick up any mail there, so it just sat in the post office.
Meanwhile, the buyer had gotten pretty angry at me and was threatening me with a paypal complaint without talking to me at all the whole week or asking any questions. I sent it out yesterday for real with no problems so he'll be getting it monday probably.
Do you have a tracking number? Have you spoken to him? The package could be there tomorrow or the next day for all you know.