The rig looks pretty good. Interior is straight, engine bay looks complete, and the heater seems to have all the pieces. New tailpipe? Given it isn't rotted or has a hole in the side of the block, I would think 1500 would be a pretty good price. Of course, 750 would be a lot better!
Your probably looking at replacing the metal roof with a lighter soft top (not necessary, but boy do they drive better!), rebuilding the steering and brakes (upgrading would be better), getting the engine running, replacing the fluids, greasing everything, and probably replacing some seals. Something to think about when your making an offer......