how about posting a partial list of the excellent condition ones, that you think may be rare, or you never heard of, or think may be worth something.. Then we could look at the list, and let you know if we see anything that is obviously a rare valuable item. A couple of things right off the bat would be Elvis 45's on the Sun Label. Or Elvis 78's. Beatles Second album with the Butcher cover. David Bowie "Man of Words, Man of Music". David Bowie album with the drag(dress) cover. Great Lost Kinks Album. 13th Floor Elevators "Easter Everywhere". All MFSL albums, and any 1/2 Speed masters. All UHQR's. Early Miles Davis, and other Jazz on Prestige label, and Blue Note, and Riverside, and Bethlehem labels. Mercury Living Presence Stereo, and RCA "Shaded Dog" Stereo Classical LP's. Any 180 gram vinyl.
Those are a few. Condition is everything, including the cover.