buying an 89 200 quattro...any tips?

so i am in a position to buy a 1989 200 Quattro (sedan) with about 180k on it. it has the turbo(which from what i've found is standard on the quattro, dunno if that's right). i've done some research, but it kinda seems hard to find any info on these cars, and therefore, don't really know what to look for. all of the reviews i've found online sound pretty good, but i'm still worried. this would be my first car, and if i get it (most likely, i will), i will be paying about $2100 for it. my questions are these.
1) How many more miles can i expect out of this car?
2) what are some issues/problem areas to watch out for? (i've seen something about wiring-specifically relays, which were just recently replaced in this particular car)
3) would this be a good investment as a first car?
From everything i've seen i should be able to get another 100k on the car at least, which would be good enough for me.