This is why I won't sell my phone on ebay. I know he was outside of ebay, but the same scam happens in reverse.
You sell your phone on ebay. Seller claims box showed up empty. They chargeback your paypal and he keeps the phone. Happens a lot.
I've never thought about that. I've sold all of my phones through eBay in the past with no problems at all. Now after reading this, I feel a bit weary selling my 5S on eBay now.