because some people like to keep their cars compleatly stock standard personally i like big audio but if i had a hsv or something along those lines id keep it like the day it came from the factory and if that means paying extra to have the genuine deck in then so be it
well i am changing the whole system to double din with subs, etc but the original system is going to be tucked away at home so IF i ever sell then it goes back in and it will be factory...that same thing will happen with everything i modify on the car...wheels, stereo, etc
there is no point keeping a SH*T sounding factory system in a car if you enjoy your music when you drive no matter what car it is......at then end of the day you buy a car to enjoy and not for the resale value....if you wanna make money buy a house
the 10 stacker system in holdens and HSVs are know to constantly skip over small bumps in road, the stacker keeps giving out error codes and you need to power cycle it, etc so why put up with it when you can get a reliable aftermarket system
buy the car you like enjoy it...simple as
as much as some ppl would like to think HSVs are "rare" there not. they depreciate like any other car no matter what condition they are in.
and i am a HSV owner myself so if i want a better stereo i will put one in...if i want better wheels i will get some....if i want a better exhaust system or if i want to put better internals in the engine i will....
it might not be "original" but hey i will have fun owning it and enjoying it