You sir, are what is wrong with society. When you lost your items would it not have been brilliant if someone had had the decency to return them to you or hand them in?
I always hand in anything I find... within the last year that's been a Nokia N95...I phoned the last dialled number and told them that I had this persons phone, a wallet full of cash which I handed in and a handbag.. I'm sure there were a couple more things but I can't remember right now..
What comes around, goes around..
You find a lot of stuff. All I've found in the last year or so is a wallet. I saw the guy who dropped it, but he was running quickly and was long gone before I'd walked up the road to where he was and saw what had fallen out of his pocket. I don't know what was in it - I just took it to the nearby police station. They opened it, found contact information from his driving licence and returned it to him.
Here's a lesson for the OP: I didn't leave my details at the police station. I didn't hand the wallet in to get anything from the person who dropped it. I handed it in because I'm not a thief.