I just came from helping my wife, a very competent residential real estate broker with a potential disaster in a home an out if state buyer is about to close on. The current owner who is someone Nebraska football fans would recognize by name is also a very successful budinesman . Unfortunately he had no clue about the proper installation and maintenance of a sump pit and pump. The pump was connected to a discharge tube that just drained back into the pit, not to the outside, so the water was just making a big loop. A second pump had been installed to help out but with no place for the water to go it did not matter. Days before closing we were pumping the water out and trying to get a plumber to make it all right. Bottom line is regardless of whom you are buying from, never assume that everything is okay in a home.