I assume they're scratched? Have you tried getting them buffed? My local Bull Moose Music stores have a buffer that they offer as a service. It's cheap.
Last night I listened first to Aghartha. It was a cult record then and is a classic now. I have forgotten how good it is, since I had listened more to "Dark Magus" and "Pangheea" during the last years, but this is just wonderful and Miles is in top form, playing much trumpet.
I´m crazy about Pharoah Sanders, saw him so many times live from the 70´s on. Actually the first thing I had heard in my early teens was "Healing Song" on "Live at the East" and it opened an universum for me. Pharoah Sanders is one of my very very favourite masters, I love him !