Well, today I saw this game and bought it. It's the japanese version and it's very curious since the instruction booklet has 4 holes...strange... I played it and enjoyed a lot but the question I have is if it is a valuable piece.
The game itself is pretty sought after and I suspect it's starting to be in the same category as Radiant Silvergun, ie. it's becoming a must-have item after being mentioned in tons of articles. However I have no idea if having four holes in the instruction booklet somehow increases the value of this particular copy.