Where to get out-of-print seforim
Answer: Some can be purchased via auction. There are a few auction houses that specialize in seforim. Kestenbaum, Baronovitch, Asufa, and Jerusalem Judaica are some.
Then there are dealers and stores. I would always first check Biegeleisen (718) 436-1165 to see if it is truly out-of-print. Then there is Seforim World, which is right next door to Biegeleisen who has out-of-print seforim.
Then there is also Pinters Hebrew Book Store, 4408 14th Avenue (718)-871-2260 who in theory is a repository of seforim people no longer want, however, if you dig one can find some gems there.
I also use Rabbi Eliezer Katzman (718)-851-0490 and R. Wigder in Mount Kisco (914) 242-0324. I have also received via email, a catalog from a dealer in Melbourne Australia, Adir, the catalog has some terrific items, and the contact email is sba-at- sba2-dot-com
One can also try bookfinder which has some Judaica dealers as well as well as Ebay.
The easiest place to get out-of-print seforim is at the library, most major university libraries contain Judaica.
New Auction Catalog Online
The auction also includes some books with pictures in them. One of the more interesting ones is the Vienna, 1813 edition of the Marsha (R. Shmuel Edels) that contains his “portrait.” R. Edels lived 1555-1631 and there is no known portrait executed during his lifetime. The portrait that appears in the Vienna edition is a product of the artist imagination and probably bears no relationship to what R. Edels actually looked like. In the portrait the Mahrsha appears with long, shoulder length hair, wearing some type of slippers, surrounded by hundreds of books.
At the same time, the Vienna publishers also published an edition of the Rif (R. Yitzhak Alfasi) also with a portrait, which is also a product of the artists imagination.