Depend whether its a real round or just a list of names and addresses from some time back.
Some years ago I picked up a half a dozen houses in one road where the old cleaner had gone missing. Nothing too unusual about that. Many months later a new guy turned up knocking on doors introducing himself as the new cleaner.
Turns out he had bought the round from the old cleaners son. I gave up the houses to him because I felt sorry for him but it was a P- take and he had really been conned. It was me who was the loser really but what would have happened if I had stood my ground?
Maybe I was too soft but he was a real mug for parting with the money, and I told him so.