I'm not the best person to take about values so I'll leave that to other people. I suspect this car needs a lot, though. Pic 8321 shows what looks like serious rust in the floors, which frequently also means serious rust in the trunk pans. If you can get back to get more shots, I'd shoot some closeups of the drivers floor, open up the trunk and shoot some inside the trunk, and crawl underneath to look at the frame rails.
How much work can you do yourself? Do you weld, for instance?