That SHO is one hell of a car. The 89 is considered the 'holy grail' of the entire line.
Top speed of 140mph in a $33,400 car (adjusted for inflation) is pretty impressive. I still kind of want a SHO but the maintenance (or lack thereof) scares me.
That said, this car is still priced too high. Restored or not, that odo is high. If the car was all original with half the clicks, MAYBE it might be worth $6k but as it stands, no. The California plates don't help the ad's case...
1989 Ford Taurus SHO Road Test ? Review ? Car and Driver
Ironically, the weakest part of the car is the manual transmission