To me prices on NOS stuff is relative to demand versus availibility.
BUT,,,,,the demand for extreme high priced stuff is getting lower and lower as these cars get older, less and less needing restored and less people want to take them that far.
$15K for an nos quarter panel, IMO is never going to happen UNLESS an insurance claim is behind it. Even then it may not. Same goes for an NOS grille of that dollar amount.


example, I know someone who recently paid $3000 for an nos grille for his car. Which in my mind is approx double its market value .
When if you are patient they can be found for much less. His insurance co wrote the ck for it due to damage