Advice needed for buying a 69 dart

Welcome from Fredericskburg, VA.

That looks like a very clean car. I paid about $3200 for mine originally, and as bodies go your possible car looks like it is in much better shape than mine was. Granted, I was paying for newly rebuilt and mildly upgraded small block that was in the car recognizing that my car needed a lot of cosmetic work. I would think if you could get it for somewhere around $4000 or so, you would be getting a good deal, particularly if the car will run. Definitely get under the car and look for any obvious problems with the frame rails.