Speaking from experience as i bought one as a uni run about. Holden Calibras are the worst cars in the f**king planet. Would not touch another one with a 100000 foot pole. People who tell you they are good and to get one are just talking shit to suck you into a money pit. Go read on the calibra forums, almost ALL of their cars have broken in some sort of way. The engine is shit, the interior is shit, hell the whole car is shit. All within a couple of weeks when i had one. Cracked head = low oil pressure, Handbrake wouldn't work. Brake lights stopped working. Sunroof wouldn't open because it fell off the tracks. Air con compressor stopped working. AFM shit itself. All this would have cost about $6000 just to repair. In a matter of fact it would be easier to tell you what did work because that list is a lot shorter.
I ended up selling it for $2000 and i was real happy that i even got that for it. I feel sorry for guy that bought it now lol.