I actually came up with one a topic asking this same thing before the "Is this game rare" thread got really popular. What the good people on this site have told me is that yes it is a rare game as not many were produced but there is no demand for it leading to nobody wanting it leading to lower price, which are not what you want. I recenlty got a copy and it's still sealed so maybe if it were sealed it would get more money, but only in 5-10 years at least or even when the Xbox's gen ends.