As I write on page 125, "Because of how this game was meant to be used, less than ~40 complete examples are known. (About 20 of these were discovered in an old drugstore in Kentucky and were sold at auction in Ohio several years ago. These have been filtering into the marketplace since, greatly reducing the value of this item for the short and medium terms.)" This may be a good "parts" item to pick up.
Mark B. Ledenbach's vintage Halloween collectibles blog.