[Peter looks around to confirm that this guy is in fact talking to him. Lots of people around, and that seemed to be a pretty specific conversation starter. Unless--]

Ohh you got my message about my walkman! [Now he's on board, smiling, heading over.] How often is 'from time to time'? I mean, doesn't seem fair sellin' things that belong to other people before they have a chance to get them back.