metro 2033 xbox 360 U.S. version in sealed new condition availibility

Can someone please tell me what the hell happened to the U.S. versions of metro 2033 for the xbox 360 because I can't seem to find any in new condition? There are millions of european versions in new condition floating around on the xbox 360 but no U.S. versions in new condition anywhere. I mean, its easier to find the 1990 nes world championships gold in new condition which is a $20,000 game as opposed to metro 2033 u.s. xbox 360 which is supposed to be a $20 game. There is something seriously wrong with beinbg able to track down a game that could cover all the costs associated with 2 full associate degrees in my college versus a game which I can't find which would not even be able to pay for one torn up course book.