Do you have a closeup pics of the authencity markings if they really are NOS?
The link below shows what I mean
http://forum.earlybay.com/viewtopic.php?f=27&t=42181&p=359320&hilit=deluxe+grille+trims#p359320" onclick="window.open(this.href);return false;
IF they happen to be repro (like I have) they still fit a treat but arnt quite as robust!
Good luck with the sale