Chargers have gone even more nuts. I have a friend with a base model 383 '69 Charger. W/auto trans. The car also is not numbers matching. But in very similar driver quality condition. (I would say a 3.2 on a scale 0-5)
I believe my GTX is a better car. Higher optioned. And build quality. But there is every indication that he could get 10%-15% more than GTX for his Charger. They are still in hot demand.