Do you believe in ghosts? If so, have you ever seen one?
I guess that it really depends upon what you mean when you say ghosts.
Sure, I believe in the phenomenon of Ghosts. I never actually seen one because as far as I am concerned they are phenomenon that can be picked up from time to time by people sensitive enough to or in tune with it. I'm usually not sensitive enough to encounter one myself, not under normal conditions, but I have seen enough evidence to show that there is something going on. Ghosts might not be what most people expect them to be, so forget the classic horror movie ghost and come back to reality.