On amazon the xbox 360 one sells for around 22 with certain sellers. But the computer version is like 9 bucks. I know the game is considered crap, but is one worse then the other?
I used to love avp2 back in the day.
I'd say, honestly, don't bother. The game is so bad, the portrayal of all races, even the humans, is absurdly bad.
The predator's spear does nothing, all you can do is throw it, you can't swipe or stab with it, it's so stupid.
The Alien's are pathetic and way too easy to kill.
The humans talk sh't, I kid you not, they talk SO MUCH annoying sh't with their cheesy voices you'll have to turn the dialogue volume off.
And the game itself is just terrible.
But if you want to brave it, go for the Xbox version.
EDIT: But playing as the alien is actually good, that's the only time these things really feel dangerous.