I've got tons of Ghostbusters stuff. Original concept sketches of equipment like the slime scooper, the giga meter, etc. by artist Stephen Dane; hand-painted concept artwork of the Statue of Liberty getting drunk and of the Scoleri brothers in their electric chairs; the original storyboards of the courtroom scene from GB2. But the real highlight, which I believe came from the legendary Forrest Ackerman collection, is a test sculpt from a deleted scene when Ray becomes possessed and turns into a demon. One of the GB fansites has a picture:
http://protoncharging.com/gb/wp-cont...st-200x300.jpg