I would pass on this car as well. I know some cars are meant to be collectors items but this is an SL! The owner and the car were denied the experience of being driven as a roadster.
I would imagine that if it were to be driven hard, now, every rubber hose, electrical component, etc., would burst.
I believe there was a thread discussing the choice of purchasing a 20 year old garage queen with 2000 miles or a 20 year old daily driver; the majority of respondants picked the daily driver.
The car is beautiful and immaculate but a crying shame.