This is one area that state to state differences are really messy.
I am looking at a "salvage" title car right now. In AR, this is a very vague thing. Privacy laws have made it a little tougher to find out the details, but in AR, you can have a lawyer to request the full title history of a car, and in my case, it might come with a "declaration of reconstruction" listing all the things done to repair the car.... I'm waiting to see if this is it, or a theft recovery (which is what my research leads me to think).
Red flag on this car was the dealer report: under the "Warranty Coverage Summary" it said "No Warranty Coverage for this vehicle, Vehicle Restricted".... usually this means a car has been written of by an insurance company.... remember, it might not have even been a wreck, it can mean flood damage or theft recovery (as it appeared to be in my cars case).
One thing for sure, if the repairs are done correctly, a buyer can get a really good car at a fair price. The percentage reduction compared to an undamaged car I have seen in the classifieds is 10-15%, mostly dependent on the quality of the repair, the extent of the damage repaired... how well the repair was documented, and the age of the car. This percentage seems to be higher for newer cars and lower for older cars that are out of warranty anyway.
I used to be into Shelby's. Shelby's and Vipers have a lot in common.... it seems that a majority of Shelby's seemed to get "smacked-up" too... once a Shelby is restored, nobody seems to care.... as long as the restoration is done in a quality manner.