There are several books and supplements for Blood Bowl that aren't listed on BGG. For example, I have copies of what is called "The Official Blood Bowl Magazine" Issues 1 and 2. I think they are reprints of articles from White Dwarf magazine. There is also "The Blood Bowl Compendium" (I have numbers 1 and 3) which are reprints of articles from Citadel Journal.
I'm looking to trade them away if anyone is interested.