Discogs is pretty good. But it all depends on what you really want. If its good clean silent vinyl, good luck. The record you buy and open and it plays silent is a myth. That never was. No matter how much time and money you put into it, the best you will ever do is get it down to a dull roar.
So my advice is, chill. A certain amount of noise is inherent in the medium. Fortunately, along with the noise comes the magic. The magic is the whole reason for putting up with the noise, and its totally worth it.
I do find it a bit depressing however that everyone notices the noise varies from copy to copy, but no one notices the magic varies as well. Lots of pressings are dead quiet, but have dreadful sound quality (cough cough MoFi cough cough) and a lot of guys actually seem to prefer that to noisy records with unbelievably beautiful sound quality.
Go figure. Whatever. Know thyself.
If you want silent you are doomed to a life of frustration. Unless you go digital. Then you are doomed to a life of no magic.
You pays your money and you takes your point of view.