E9 prices are WEAK compared to other Euro cars of the same period...
The BMW E9 is the neglected step child compared to other Euro cars from the same period...
Check the ebay sales history and you will see the same cars listed repeatedly for weeks and/or months on end and the average sales price for what look to be decent E9s (2800CS + 3.0CS/CSi) is around $16,000... CSLs and Bats are a different story...
With vintage Porsches (356 and 911s) from the 1950s all the way through the 1980s seeing a MAJOR increase in value and also the same situation with Vintage MBZs, Ferraris, Alfas, Jags, even Triumphs and MGs, why are E9s dead in the water price wise?
Coupeguy and Mark in NY might occasionally sell an E9 for big money but the "Market Value" that most E9 buyers pay is in the $16,000-$18,000 range. Look again at ebay and you will notice the "BUY IT NOW" prices are usually in that range. This proves to me that even the E9 owners value their own cars in this very low range. Most vintage car sellers will research the market and base their asking price on what they determine the "Market Value" is based upon recent sales.
I have only been in the E9 world for the past 2 years and absolutely nothing has changed as far as E9 value in that time. Although I was in Monterey last month and that is definitely not the case with the other Euro cars of the same period. 911S $215K, Dino Spyder $450K, E-Type Jag $165K
I recently spent around $23K doing a minor cosmetic restoration of my CSi and now I am in the car around $32 which is probably more then the car is currently worth. Lucky for me I am not interested in selling and the crazy value of my (6) Vintage Porsches and Dino Spyder will help ease the pain.