I recently (this last weekend!) bought a large collection of first run Star Trek books, they were $30 on facebook for 60+ books, which is a great deal for these first edition paperbacks. They mentioned that there were several Trek fan club things too, which were included in a large envelope.
When I got home, I found several welcome letters from Gene Roddenberry, and signed by Gene. I thought that was awesome, but then I found a picture of Spock and Kirk, signed by Leonard Nimoy and William Shatner.
Well worth the $30!
Have you had any pleasant surprises like these?