Historically important concert, good audio quality for the period, and interesting to hear how fully formed these musicians were at such a young age. Also interesting that despite the political and environmental awareness of the performers, they don't speak directly to the occasion of the concert. I'm at a loss to explain why the CD commands such a high value.
Great peek into an early stage of the careers of some of my favorite musicians playing their soon to be iconic music. Good quality recordings, intimate concert setting.