It has 150K miles on it.. No matter what you do, it won't be brand new condition.. Not even close. The amount of money you would have to dump into it would not be worth the payoff in the end.
I kind of skimmed your for sale ad on Clist.com... But from what I read, you will be very lucky to get 6,000$ out of the car.
If it truly was brand new condition.... Like say a car with 20K miles on it that has been garage kept its entire life and truly perfect, 15K$ tops. And honestly, that would surprise me.
Good luck selling the car man... Try to look at what other cars are going for similar mileage and condition and price it accordingly.