A man dropped money on the street, €60 in 2 20's a 2 10's. He was rushing for the bus though. I kept it because of that.
But if a person dropped their wallet, or mobile or anything and wasn't in a rush i'd give it to them. My Father received a call once at home from a stranger, she founds my sisters phone and called "Home" on it, my Sister got her phone back
I'm sure the man is OK now though, €60 isn't too big a blow.