I agree with Elizabeth - find local supplies, or failing that, people who you do trust both here and on ebay (my ebay experiences have been quite good for the most part - there are several great sellers on there). There is no way a grading system for LP's could ever become standardized, too many variables. And I also agree that there are far too many people simply trying to charge too much for them, especially on this site.
Time To Impose Minimum Standards for LP's
Many Audiogon Members have invested substantial sums in acquiring high-end Turntables, Tonearms, and Cartridges. It seems appropriate that sellers of vinyl records should consider that fact before they list records for sale. Damaged records are not playable, IMO, on any Audiophile Turntable. Personally, I will not play a record that is a "7 out of 10" on the Audiogon scale. Nor will I resell such a record. It is destined for the round file in the corner. Yet today on Audiogon there are records offered which are rated at "3 out of 10" and which are described as damaged but "too good to throw away". Please save the junk for some other venue, or yardsale. Perhaps it's time for Audiogon to impose minimum standards for Sellers of music. Because the listing is free is not a legitimate reason to offer junk on this site.