This is not a car to wholesale, IMO.
A car like this is very, very rare - one original owner (car enthusiast with means to maintain it), no accident, very low mileage, rare and beautiful color combo.... I guess the interior is pristine given it's been so lightly used. Basically like new 13 years old car. This must account for something for someone.
More so, it's due to receive a new valve cover gasket anyway (recall) so even that concern is alleviated.
The market tells you what the car is worth and the only way to find out is to post it higher and see what brings in. If I were you I would post it for $15,000 and see what happens. You can always lower the price if it doesn't sell and you absolutely have to get rid of it.