I always download these books when they are first offered. Maybe it's a throwback to my pre-digital fear that somehow they will become sold out. Or maybe I fear that they will vanish. I have seen some Kindle editions offered at Amazon.com, then withdrawn. (Case in point: "The Cygnus Mystery.")
In any case, I continue to highly recommend these books to any Seth fans out there (and there are probably more than a few). Have Seth's ideas succeeded in changing the world yet, as Seth predicted they would? I'm tempted to argue "no," yet, somehow, through some vector, "his" ideas are becoming widespread--mostly in the "New Age" community, but also in the esoteric realms of "edge" science. Generally every New Agish sort of book that I've perused makes a nodding reference to "Sethian" ideas, albeit without reference and in a distorted fashion.
And there are some interesting tidbits. Near the end of Book 2, which I am finishing up, Seth compares / contrasts Carl Jung and Sigmund Freud, and counterintuitively gives Freud more credence. He also notes that Jane Roberts is reading "Cayce," stating that "many" of Cayce's observations are "extremely valid." This could be none other than Edgar Cayce, and to my knowledge, this is the only reference to Cayce in Seth's writings. Which causes me to wonder: what did Seth think of the whole Cayce channeling phenomenon? (His opinion of the various contemporary "reincarnations" of Cayce might be easier to predict. But I'm no prophet--not even a sleeping one.)