k-dated S/42

my god! i have been reading some of the messages on the board and found there is a whole world of people that are really experts about this weapon and talk about little refinements like different types of bluing and what country did what. I am pretty sure that nothing has been done to my uncle's luger, mine now. it's just like it always was since he brought it home, and although it has been fired, it's in perfect shape.from the story about how my uncle got it, i am pretty sure it is authentic and he was no liar, not even a bull shi--er. what are these weapons worth? is there a "blue book" for guns like this, like the Gun Digest? thanks. lawrence (larry) klang