I'd say be very sure about this "properly maintained" bit.  I have a 91 G20
and although I have heard nothing bet good things from all the people who
own them, this car is a mess.  At 130,000 miles we had to replace the
engine, the power steering would work now and then (some kind of electrical
issue, got it fixed), we were told the steering rack needed to be replaced,
some factory only bushings in the front end are worn out (165k miles) and
now the car stalls out when warm.  I have done all the right maintenance to
the car since we have owned it, but someone was not a good person to it
somewhere in it's past.  If this is a car you are considering purchasing,
please have someone go through it first, our has cost close to $6,000 in
repairs over the last 3 years.

Aaron