In San Ramon, California there is an awesome used/new book store called Bay Books. The staff is super, super knowledgeable. And Friendly.
The selection is outstanding, and tons of the books are in awesome shape at about a third of the price.
I found a couple of C.J. Cherryh books that I’ve been needing.
If only they were within walking distance of my house. But then again, I would probably end up needing to build an addition onto said house, to fit the expansions to the collection.