I've got the 06 limited Roadster! The only addition I would make would be an SRT Roadster in great condition.
How much to pay always depends on the circumstances; I think they will get much cheaper before they gain any value; so I think I'd wait him out.
Let's face it everyone on this forum "LOVES" this car, but time will tell. It' will take years before this car gathers any collector value! (More years than I've got left in the tank)
However, I think the fast track to additional depreciation has alot of
momentum. IMHO--aint gonna change any time soon.