Just going through my collection I think a found some more stuff.
Thurston Moore - Root
Guitar pieces by Thurston remixed by various artists. Comes in a vacuum bag limited to 2000. I just realized I'm not sure where my actual CD is though!
Fugazi - Noise Bleed!
I haven't seen much info on this so I'm not sure if it's that rare at all. No info on the actually 7". Released through SB Records.
Side A: KYEO - Silence is a dangerous sound
Side B: Waiting Room - Recorded August 1991
I also have a bunch of coloured vinyl that probably isn't too rare.