Yeah, but most of the ways to read him involve either going to someone's rickety 1990s website that makes all the security plug-ins shriek about malware, or weirdly anonymous Kindle books that look like someone just put up a text file and are now charging $1 for it.
I'd like to have a professor of literature or something write a nice essay explaining the work and its context, maybe pull some good fantasy art that was once associated with his works and put it all together in something approaching the way we treat any of our other classic works.
At the very least, it'd be nice if Goodman Games, which publishes fiction periodically and name-checks the King of Elfland's Daughter in one of their adventures, put together a compilation. (Of course, if Joseph Goodman listened to me, I'd also have him publishing big art books with retrospectives of Erol Otus' and Russ Nicholson's work, so it's entirely possible I would bankrupt the company pretty quickly.)