Price seems a bit high, but the car has been owned by an enthusiast who seems to really take care of it -- most p-cars of this vintage in this condition will be available in the $thirties, but the turbo-look option is rare, and maybe even "collectible" with a potential for increase in value if you maintain it. The Lindsey wheels cost thousands to build and they are as good as you can get.
Here is a good resource for the M491 option:
M491 Registry Website