Twin Snakes

[Lord-Of-Darkness]

I've just bought a gamecube for £10, and I've been picking up cheap games from amazon and ebay for a few pounds a piece. My biggest problem being that while remembering games I used to have/like when I had a Gamecube back in the day(such as Super Smash Bros, DoR2 etc, which are going for about £10 a piece) I remembered Twin Snakes, the remake of MGS, with MGS2s graphics and gameplay.

The problem I'm having is I can't seem to find the game for any less than £40, which is pretty high for such an old game. Is there any reason why this game seems to be so much more expensive than any other GC game?