Long time reader, first time poster.
This thread is amazing, to say the least!
I've been a Mets fan since 1968 and am an active '69 Mets collector.
Here are some of my favorite tickets/stubs:
Game 5 stub from the 1969 World Series.
I was at this game as a 9 year old Mets fan and even ran the bases after the last out.
Game three of their sweep of the Braves in '69 that took them to the series.
Full ticket and stub from the game where the Mets clinched the pennant in 1969. This was, at one time, the highest attended game in their history so I really don't think there are too many of the full tickets out there. The condition of the full ticket was not a consideration due to the rarity and significance in Mets history.