Opinions on a Roadrunner...

We have not heard back from the OP.
I know a lot of people hate FB mainly because of their politics. Or lack of! But it has many good car people and specific group for certain models. If a person wants to know what the died in the wool enthusiasts for say, 68-70 B bodies, there is an active group there that cusses and discusses it all continually. Some reading will tell you want 68 RR are going for in what conditions. Same for71-? B bodies, A bodies , you name it.
But I have always argued the definition of a muscle car was thought up by some advertising dude (dud) at Pontiac, pushing the GTO (Goat).
Give a 62 Max wedge or even my old 73 Base Charger, (not a Rally) 400 4 speed car , one of 75 built! No one called either a "muscle car"! ha
No on wants to "overpay" for anything but if the buyer is satisfied with his buy, that is what really matters.