Estate Auction Find of the Week

I picked-up this sealed puzzle as part of a lot at a local estate auction, little did I know that it was rather rare. What I found was that this is the elusive The Valley of Gwangi promotional puzzle, an ultra-rare premium that was originally sold at major movie houses when the film was first released.

As I am not a huge collector of Harryhausen items, I will probably eventually part with this. Although I have no idea what it is worth, and the only one on ebay is listed for over $200. If anyone has information on this, I would appriciate it. My email is ringmaster@scarletcircus.com.