Looks like a real nice car, but...
I don't see a dual quad 427 motor on Roush's website...
http://www.roushperformance.com/engines/engines.shtml
Hey, maybe the carbs were changed out. I would check this out real good. If this is not really a Roush motor I would walk. Wouldn't believe anything after that.
Low mileage... Like someone said, it is real easy to disconnect the speedo. Also like someone said, maybe that is the mileage after the speedo was changed.
At this point, I am not sure a car that has sat around since 2007 is a positive feature. A well maintained example that has been sorted and bulletproof is worth plenty. Mine has 18,787 miles on it. Wish it had more. I put on as many as I have time for.
Jack