Just like the funeral home question, it would absolutely not change my mind at all if I knew someone died in the house (the exception being what Chris said about too much publicity - anyone else enjoy American Horror Story on FX? - one of my fav new shows). In fact, I'd insist that the seller/realtor tell me exactly where in the house the murder/suicide/death occurred.
I know for sure that there was at least one funeral service held in our house - that of Mr. McCullough - and I imagine his wife who had passed earlier was "sent off" in the house too. I know that Mr. McCullough died in Erie in a home, but I don't know what became of Mrs. McC.
Being the curious skeptic that I am though, I'd probably be inclined to try to seek out any resident spirits (benevolent OR evil) and that might just get me in some trouble!