I wonder the same thing.
I bought my SSB SRT6 convertible because of the low production numbers and IMHO it was a huge bargain when considering the sum of its parts....."MB","AMG".
I bought my car long distance, from a Chrysler dealer in Minnesota who sold it new to a female doctor. ....I live in Massachusetts.
A co-worker bought a Crossfire when they 1st hit the market. Her serial production number is something like 33 or 35. While talking to her about it, she made a statement which prompted me to learn more about Crossfires. The statement was ," My car was built in Germany, but now they build them down south some where." I knew she was wrong, and began reading everything on the Crossfire I could find on the web. That is when I became aware the SRT even existed!
The combination of MB, AMG and Karmann were a winning combo for me.
When I discovered that only just over 900 convertibles were built and what they were selling for, my decision was made.
I bought mine, having never driven one or even sat in one. I got lots of pics from the dealer, on the lift, etc., Carfax and the maintenance history all done at the same dealership. I also got the window sticker...$50,265.........my price for all this....$15,600.....
This was a no brainer.....Ford Escort money for a high performance, quality built car, from 3 of the best in the business. For me, a self proclaimed Car Guy, this was like having the stars align, or the Barn Find deal you always hear about that never happens to you.
From what I've seen over the years, what make a cars value increase are, rarity, race history or a story. We have rarity and a story with this car.