Moses died and was buried by God.
Just because Elijah and Enoch were taken up without dying, does not mean that one can (excuse the use of the best word available) assume that it happened to Mary just because Scripture does not explicitly state that she died.
That kind of reasoning, that since Scripture doesn't say something did not happen means we can presume that it did, leaves the door wide open to all kinds of error. We could claim that Peter owned a skateboard park since Scripture doesn't say he didn't.
metmom, when Moses appeared with Jesus and Elijah at the Transfiguration, was he a ghost?