I was talking to someone in another town about this subject. He said, "this town is so old, there is not a house in town that someone hasn't died in."
It wouldn't spook me to live in a house that someone died of natural causes. A mass murder house... that might. Especially if the walls moaned or chairs moved across the room unaided.
Some locations in the US have disclosure laws for things like murder. There have been a few lawsuits over non-disclose of haunted houses.
