Just a couple days ago I got my first Sam & Max comic, it was "Bad Day on the Moon", I just asked my local comic book store about anything Sam & Max and they said the could just put a vague order on it. (Sorta like "If anything comes in, we'll send it here.") I payed $3.50 CAD for it, I thought that was a pretty good price. It was in excellent shape too, only a couple of crease marks around the spine.
I'm still hoping they find more. I also got the tapes off of the videoflicks website as well, good stuff those tapes.