I have driven across town to see guns declared by their owners as being in "great shape". One was missing two screws and had a rusty bore, the other was missing the hammer and sear.
I believe the last one that I saw sell went for around $1300 on the big auction site and that was without the box. I think you could probably get close to $1500 if you were patient and the gun was in good shape. There were only 405 of them made.