Those GT finish panels in NOS shape commanded a premium price even back in the 70s. I had a 67 GT that was hit hard enough to open the trunk. The persons insurance company sent me a check for the finish panel and the badge because they couldn't locate one to finish my car. It took me 6 months to finally find the panel, badge and the four pieces of trim. Luckily I found the pieces in a dealership that had been special ordered by someone else and never picked up.