You guys don't read enough crime fiction.
FOLLOW THE MONEY is the best way to find out the truth. You look for the money trails. The crime always gets solved when you figure out who benefited.
My vote for the best piece in my collection goes to the original hand written STAR WARS budget.
Mind you, my favorite piece is Mentor Huebner's FLASh GORDON boards, but I think the most historically important piece is this budget. The photo with the letterhead note shows how large the budget pages are, and the photo next to, how thick it is.
It may be esoteric to think this is the most important. This isn't flashy or glamorous, but this is where the heart of STAR WARS lies.Without these pages, STAR WARS would never have been made. It's that simple. It's all about money.