Your post is only a few hours old, relax. I thought I saw a pcb sell for 99 bucks alone but I guess I was off a bit. looks like 50 to 75 is the going rate for the pcb.
Re: Price Check Space Duel, Star Trek, Galaxy Ranger..
I think 500 bucks sounds about right. They'd be worth more with a few issues resolved but I wouldn't pay much more than 800 even if they all worked right.