Due to the exchange rate, I imagine that some people also did pretty well selling their cars to non-US buyers over the last couple of years. In the end, after sales tax (which is a big hit in CA), maintenance, and mods, few people will be ahead of the game if/when they sell. Kirkham and Shelby owners would probably fare better than most in retaining their value.
Long term value was a consideration when I bought my car, but I stopped thinking about it the minute I got behind the wheel.