This is a good place to start.
Rwwear. Thanks that is a good place to start at the end of his artical he states the way life is in the world of LP's:
"But I know that no two records sound the same. I know it for a fact. I also know that you can't tell a good record by looking at it. So if you really want to sell[buy] the best records, you are just going to have to play them."