370Z 40th worth

[Alleyoop]

I have a 2010 370Z 40th Anniversary that I have been thinking about selling it.
I went to a CarMax dealership to get an apprisal. They looked the Z over for abput 45 minutes and could not find any discrepancies. My Z has 20,320 miles on it, has no damage anywhere, is competely stock, has the original car cover, gym bag and 40th Anniversary Plate. They apprise it at $15,000. I felt that they must have thought that I was a fool and that I would accept their offer. I have seen numerous 350Z and 370Z in terrible condition being tagged at a much higher price. I'm not trying to make a killing on my 370Z , just a fair offer/sell. Any input would be greatly appreciated. I know that if I do part with it I will have sellers remorse.