Where do you look for rare records and pressings ?

Yeah, chase never ends. Since I don't need many records I have an advantage when it comes to the price, within reason. Couple of records a year is fine. Trusted dealers is a good idea, those that kind of accept special orders.
By the way, I ignore amazon as much as I can, it is a monster company closely aligned with the government, not the best part of the government. I don't care what they got.

Yard sales pretty much dried up around here in N. Va twenty years ago, after a rapid decent. And it used to be so great for a long time, maybe the best in the country. I could hit fifty yard sales a day on a good day. Maybe it’s all the recessions, but now it’s only dirty baby diapers. eBay is the final frontier.

I did get a few from Japan on ebay but that's it and I can't check ebay every hour in an effort not to miss anything. Same with discogs. We just need more upscale vintage boutique stores, not only for records. I liked ebay much more in the beginning when there was no buy it now, only auctions. It was a little wild and sometimes you had to send cash. No problem for me, I lost some but gained more. And there was virtually no overgrading, in my experience, and Japanese usually downgraded.

Discogs, WFMU's annual record sale (though I've only been once since I live on the west coast). I'm also fortunate enough to live near several excellent record stores.

I heard that German audiophile society can be a source for master tape dubs, not sure about rare records. Besides, I don't speak German, though a number of Germans speak English.