Yeah I know you’re right. The E9 CSL is hugely rare, historically important (///M), beautiful, and successful on the track, and therefore valuable.
But I personally think the standard E9 models are even more beautiful, and so I wanted to see: if you just want the particular chassis shape, either original or as a base for a resto mod, how does the E9 compare?
And while a 3.0CS will never be a blue chip car like a CSL or split window C2 or Ferrari GTO… I think they do pretty well by your criteria in that next tier down of “collectible and attainable and drivable” classic car. They were important for establishing BMWs reputation as a drivers car and race car. They are extremely beautiful. And even before the tin worm started to work, they were quite rare compared to the other desirable chassis’ from the era.
Guys who can afford a CSL or Aston DB5 or whatever are in another league from me. Some of them may not even care about the car. They just see it as a way to diversify the portfolio when the market is down. But I think there will always be car guys who fall in love with a particular model, and want to own one some day. And among that crowd, the E9 is quite rare by the numbers and will always command a premium over your average Camaro or Gen-1 911 or E-type etc