Thought I'd chime in on a couple of the pins. The Viper pin went for $1200. Probably a bit high, but not too bad.
The Attack from Mars pin had me boardline outraged. Short of a pin that had caught fire it was probably one of the worst condition modern pin that I've seen. The playfield was pretty much trashed and worn through to the wood in several places, the display was shot, the flippers were weak, the center drop targets were being held up with wads of paper, cabinet was beat up and the game was overall in poor shape. Despite this the game still sold for $3100, or almost $3350 out the door. I'd say it was good for parts only, but I really didn't see anything on it that would have been good for parts. I guess the alien figures were in OK shape.
I was just shocked that someone would pay this kind of money for a game that would need this much work, especially considering nicer examples come about from time to time for not all that much more money.
Nobody else has mentioned it yet, but what was up with the power? The preview was pretty much pointless considering they only had about 10% of the games powered up and running...