CR1's may be some of the toughest cars to put a price on, as they were all over the board when it came to options, etc.
There has been one for sale recently as Surf mentions, for $45k and it is a black / black 1990 AeroBody CR1 w/ << wide >> OZ wheels and maybe coilovers -
maybe...
Other cars, like some of the CR1's that we have had the pleasure of seeing at Carlisle, etc. over the years have a lot more "Callaway Content" than just the SuperNatural 475 engine - most of these cars are SNAT 490's and have custom Callaway exhaust, brakes, and in the extreme exotics - the full interiors like a Callaway Speedster :eek
Certainly an awesome car to consider, the CR1 leads my list of "must haves" before I die - the question is, would I be killed in the process to owning one :ugh