Is this Rear trim panel from a 66 Dart?

I'd ask MORE than that.

you can but that's about the going price for a really good one, those higher priced ones are on the ad site and have been there for years. I've bought them as low as 45.00 and up to 120.00. but the 120 one was pretty much letter perfect and had just been re-anodized. Anything more costly is just that "more costly". But you CAN ask for more and someone "might" pay that price if you are willing to wait.