I just got a whole bike of the same model (but 89) and the paint was even worse than you describe. The frame is fully chromed underneath, and the paint doesn't bond so well as a result, making it chip REALLY easily. Mine was so bad I decided just to strip it completely, so it has no real collector value anymore, but should be a fun ride.
Mine is a 59 and seems about right for my 189cm height, so 63 is way too big for you.
I'd be interested to know the value too, as when I leave Germany in a year or so I'll be selling mine too.