If lightly circulated $30,000-$40,000
would probably be about right.

If Unc. probably a bit more.

Currency Auctions of America (CAA) has sold these in the past. CAA is now
a part of Heritage. I believe they have an archive of their past auctions at
their
website at http://www.heritagecoin.com

You could always go with Ebay but if
you are interested in selling it I would
recommend CAA instead for something
of this magnitude $ wise.

Good luck.