Advice on buying a '75 dart.

Nice looking Dart, this alone is a positive, but I would take the car for a long drive and run it as if you would be driving it everyday if it was yours. No pictures from underneath of the car, I would have to take a look see if the frame rails are OK, along with exhaust, oil leaks and the such.
If all checked out I would be in at 4 to 4500...... tops @ 5000 if the guy does not want to barter AT ALL I would just walk away, cash in the pocket is a great motivational speaker......