All: I saw and visited the 1988 M3 today. It indeed has 78,000 miles. It is that silver gray color. It drove well. It has a few door dings. The seat bolsters have a little wear. The sunroof inside fabric hangs a little in the front.
The bulb in the OBC is out, and there is a slight rattle from the shifter linkage at high revs.
The car is the real deal: unmolested/unchanged. The owner bought it from the local dealer after it came off lease from the first owner in April 1991. She's had a local shop where it has been serviced make a nice offer. I can send pics (I took a bunch). Now is the time to step up and make an offer. Contact me here or mattm "at" optonline "dot" for pics or questions or offers.
To whet your whistles, a pic with my car nose to nose.
