ghosts stories??

Here's one I heard on the radio from a woman who told her story about seeing a ghost, which is scary: A few years ago, the woman and her family had just moved to a new house somewhere in Melbourne, Victoria, Australia. One night, her baby son was crying so she got out of bed and went to see him. Suddenly, the baby stopped crying. The woman knew that he must have fallen asleep so she went back to bed. A few hours later, the baby cried again, so she got up and went over to check again. As she opened the door to her son's room, she saw a boy, about 6 or 7 years old, calming the baby down. When he saw the woman, he disappeared. The woman was shocked and later told her neighbours what happened. The neighbours already knew about the ghost and told her that there was a boy who died from an illness, about 80 years ago, and was buried under the exact place where her baby son's room is. So it leaves me thinking do ghosts really exist???