The best thing you can do IMO, is have all the service records organized in a file. Make copies and black out your personal info, address, phone and credit card info. This will do more for both the educated and not so educated potential buyer to help them feel comfortable about buying a ten year old car. Tell them they can have the file if they buy the car.
Other than that, just clean it up real good and make sure the interior doesn't smell like feet. LOL