The weirdest "gem" of my collection for me is the original copyeditor proof of Palladium's POWERS UNLIMITED THREE by Kevin Siembedia with all of the various markings/comments/insertions. Being a Heroes Unlimited player and long-time copyeditor myself, I loved getting that as a surprise gift in a Palladium Christmas Gift Bag a few years back. For all my jokes about "Palladium: we skip the editing and pass the savings on to you!" when playing Rifts and trying to find anything, it's really neat to see how the sausage is made (I'm used to educational publishing, so it was great insight to flip through a game book in-progress)...