This thread is fascinating to me as it shows the"personality" of the collector coming through. I have a few games that are uncommon, but they are great players and that is why I have them.

Williams Solar Fire
Williams Defender
Williams Warlok
The older games may have been higher production numbers, but the "surviving" copies sure can be hard to find.
Williams Beat the Clock (1st Williams multiball)
Bally Star-Jet (2nd Bally multiball game, first game with a lock and release multiball system)

All of these games are true players to me and I love sessioning them out. I have been fortunate to play a few truly rare decks (Krull and Pinball Circus) at the generosity of their perspective owners. Those games are really fun, but they were not decks I ever looked for in my own collection. Liked them, didn't love them. To each, their own. Play on!

I looked for both of these tables for years. Just got Star-jet this August. Found it in an old warehouse in Scottsbluff, NE.

The Censor-bot couldn't handle it.