looked at 1990 90 quattro 20V - info please?

[GaidosIII@aol.com]

All,
 I went and looked at an aqua marine 1990 90 Quattro 20V today that is for
sale here locally. First impressions are the car is in very nice condition,
all features work and it seems to have all the options, i.e. heated
everything, leather, ski bag option and so on.
 The asking price is $8900 and the car has 74,000 miles on it. Looking under
the car I could see a little moisture from a possible oil leak but otherwise
could find nothing wrong with the car.
 Anyone have any experiences, warnings or other info for me for when I look at
it a second time?
Thanks
Anton