Finally found and purchased Guilty Gear X2 for PS2, yes I know I have the Xbox version.

I just want both versions of some fighting games, so I can have one to play offline (PS2) and one to play online (Xbox).

I'll be getting the PS2 version of Street Fighter Anniversary Collection soon if it's cheap, or just wait after Megacon and purchase it at the same time at the release of The King of Fighters NeoWave.