I have a pretty sweet vinyl LP boot called "Am I Evil?" which was recorded @ the Monsters of Rock festival in Nuremberg, Germany in August '87. I should've been at that show because I was in Germany at the time, but wasn't (see my entry on the "$5.98 EP" in the Metallica Discography Thread for that whole story, I'm not gonna go into it now), but at least I have an audio reminder of what I missed.
I have several other Metallica boots of varying quality -- "Cee Four" (2 LP set, apparently recorded sometime in '85, sound quality is meh) and "Sanatorium" (2 LP recorded in '89, sound quality is terrible) and a bootleg CD called "Bay Area Thrashers: The Early Years," which I found out later is just a bad-quality copy of the "No Life Til Leather" demo, with fake crowd noise stripped over it so it can be passed off as "rare early live material." Fortunately I didn't pay too much $ for that CD (ten bucks, I think) -- as I said, the quality sucks but I keep it around as a conversation piece.
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"If you're a false, don't entry, because you'll be burned and died!"