Best of luck with your sale, I have a 2003 Black on Black Convertible with 14,600 miles, all stock other than K&N filter and Flowmaster cat back system. Just like yours , spotless in , out and underside. Some of the guys on this site, don't seem to think the way the car has been cared for makes a difference in value, I have been thinking about selling mine to buy a new Vette.
Need #7 from below, thanks.
https://www.svtperformance.com/forums/threads/new-market-rules.1100175/