Not surprised you are having a hard time getting a $$$ answer...
The answer to your real question, "How Much?", is actually very subjective. It also depends on who wants the car and the size of their wallet. Then again, there is the question of availability in your area...
If you are not prepared to do a great restoration, these guys are right! An original car is a wonderful thing to find! Assuming the car is in great shape, it could bring as much as $23,000 unrestored in my part of the world, which is NC. A show car (good restoration) could bring $27,000. Could you bring your car up to show level for $4,000... maybe not....
But again, that's my informed, but subjective, opinion.