I'm 13 years late ! Abeit the timelyness of this post, it's uniqueness, retro design, and in the case of the SRT6 rarity.
Graphite grey coupes aren't too plentiful these days. The Crossfire numbers in comparison to most cars are low, and the SRT should become even more collectible as years go by. Estimate approx 400 Graphite coupes, the roadster half as many.