Got it from my lgs, just sitting on their used shelf. Also picked up 2300 Star Cruiser. $10 each for the full good condition boxes, that seem to be complete. I even have the GDW Game Response Card.
Kafer Dawn was with 2300AD as well, and was included when purchased new.
Sorry if this seems like no big deal, but I was ludicrous when I found these so cheap. The pic on the back of the box is worth it. Miller, Brown, Smith, and Chadwick ala 1987. Brown is all Hall and Oats.
The game itself seems awesome btw, I just started reading it. Nice take on interstellar politics and alien contact.