Originally Posted by W///
The E30 will always be the most special M3 as it's the first.
All subsequent M3's will depreciate and not really be a collectible car. The clean and well maintained will be at a premium, and probably harder to find as these cars become more affordable. They are all special in their own way.
This is post is completely inaccuarte, there is no way to tell for sure that "all" subsequent M3s other than the e30 will or will not be classics, unless you can predict the future.
As for the e9x M3, guess you have not seen Motortrend's latest prediction.
It makes sense the e9x would be a classic down the line, all due to its fabled V8.