...performed by Laurie Anderson that was never transfered on CD since it doesn't have lead-in groove. You cannot actually play this record from the very beginning no-matter how good you will aim. I've never seen it neither on ebay nor on any vinyl website.
Also I have a CD of Henry Kaiser and Sergey Kuriokhin where they strongly suggest playing tracks randomly every time you want to listen so you will hear the music different.
and, the new 'super furry animals' album, 'rings around the world' has a cool feature: side 3 plays from the inside out! and, one of the singles from the album, i forgot which, plays forward from the outside, then backwards from the inside, going on forever.