@voodoofunk
Good original post. I have spent the last couple of years going through my record collection which consists of LPs I purchased and records collected over the last seventy years by my father and other family members which they handed over because they were getting out of vinyl. The first pass was a general screen of physical condition, program, and recording/pressing quality. I cleaned anything that looked at all sketchy, and sold to Easy Street or gave to Goodwill over 100 albums that I knew I would never play again.
My second pass through the consolidated collection I have been cleaning, listening to, grading, and cataloging on Discogs every record I have. During this careful evaluation I have experienced many cases where the visual inspection of a cleaned record doesn’t match the the sound quality I am hearing through the speakers, sounding either better or worse than I would have guessed or rated based visuals alone. So, 100% to your original point. Discogs’ grading system references sound quality as well as visual condition in their grading guidelines, and I try to pick the lowest grade for appearance or sound quality when assigning a rating to my records.
This has been a labor of love for me involving several hundred hours for a heavily curated collection. For a professional record trader/dealer, I think it would not be possible to do this for every disk they handle - I just don’t. For any used title that they are selling for say >$150 I would hope that they would play it first (aka as Better Records claims to do). But for standard used fair which is now going for $10-$20, I don’t see it. If you are buying out of someone’s private collection, I would expect that they have listened to it and are grading accordingly.
Easy Street, my neighborhood record store, has had turntables on hand that they will let you use to listen to used disks before you buy, and I have found some spectacular sounding records that way. For mail order, no can do. You pays yer money and takes yer chances.
kn

