Regarding the magic book, I think the difficulty in selling something like that is the limited market -- it's a small, select group of people who know/care who Mrs. John Le Breton is. Then, you need them to be collectors as well. I'm speaking from experience. I have a fantastic piece in my possession, A Goddess Arrives by Gerald Gardner. In the occult world, Gardner is a celebrity, considered the founding father of modern witchcraft/Wicca. The book was pressed and paid for by him in a *very* limited run. My copy comes with provenance, last sold in an occult shop in London for 1000 pounds in 2004, it's wonderful -- except, the Gardner museum already has a copy, and most people who know he is don't have money for collection pieces like this.
I looked yours up, and I have a question: does it say 1st Ed. inside the binding?