From the description the car seems mildly modified...... not too
sure what 'etc...' accessories includes. The engine seems stock as
well as the turbo (hopefully both were not replaced!!).
High fun factor (as with most turbo cars) and a seemingly practical
performance car.
High on fuel consumption i suspect as the ECU is upgraded (should
be mapping for higher performance, dun think its to map the car for
better fuel economy!!!) as well as exhuast.
Pricewise, look around a little, direct sellers might sell it
lower. Remember though, unfortunately aftermarket parts adds no
absolute when scrapping the car, pay more if you really want and
know what the parts are worth (at the buyers expense) and even
then.......the price should not exceed market rate.
My take on performance car with aftermarket parts: The owner will
need alot of time and passion for the car. You will look forward to
drive the car every single time and the car will be a headache for
you every once in a while, kinda like a passionate love affair!!!!
haha!!! 
P.S. Bring someone along with experience on these cars and parts
when buying the car and dun jump onto buying it just because its
rare and looks great. A better car could always be just around the
corner!!! Cheers!!!
