Need Some Advise

There are for sure more than a few signs that its not a formula s eventhough mopars where like burger king back then, you could have it your way. No s stripes, no s emblems, then check for the other popular options for the s like front sway bar. Obviously the best way is to get the vin tag info. Regardless, if the car is clean and all metal then IMO its worth $5,500 easily. I agree, dicker and then bring it home even if he wont budge. Good luck and let us know how it goes!