Someone asked for other authors. Here are some SF and fantasy writers I happen to know about who've self-repubbed at least some of their backlist books:
Vonda N. McIntyre
Doranna Durgin
CJ Cherryh
Jane Fancher
Lynn Abbey
Diane Duane
Gerald Weinberg
Kevin J. Anderson
Jeffrey A. Carver (me)
There are some others listed at
backlistebooks.com as well as
bookviewcafe.com.
I've been trying to get some more of my writer friends to do it, but for people who aren't already ebook readers, it seems a bigger hurdle than I think it really is.