Edited sentence: Clearly this is a marketing ploy, since a house that is for sale is either someone else's home (the vendor's or the sitting tenant's) or no-one's home, but not yet the home of a prospective purchaser.This usage, however, has crept into everyday speech, in which, for example, residents of American suburban subdivisions will often refer to both vacant and inhabited buildings as "homes" rather than the more correct term, "house