>reputable public domain copies would be available at reasonable prices
so I read a lot. Mostly on the kindle. Lots of public domain classics; I love Conrad and Melville.
I'm also pretty happy to kick in ten or fifteen bucks to avoid spending time finding the best formatted/least incorrect copy, even if the book is public domain.
but you know what? when I buy public domain e-books, there's so much crap mixed in that is worse than gutenberg that I often end up going with Gutenberg first these days, if my favorite publishing houses don't have a copy.
It's actually easier, I think, for me to find quality e-books of books that are still under copyright.
I mean, this is mostly me complaining about amazon and how they aren't really serving my needs even when I'm begging them to take more of my money... but it's also a point that finding reputable public domain copies is awful hard.
For those of my taste looking... my favorite publishing house for that sort of thing is Melville house publishing; but they have something of a limited selection of public domain reprints. (they do have their 'art of the novella' series, which comes out in the cutest little paperbacks. And their kindle formatting is consistently good.)
on the other hand gutenberg formatting isn't great, but it's consistently not terrible, which is more than I can say for a lot of the dreck you find in the kindle store. And a lot of people have a different time/money equation, and sometimes books under copyright aren't available on the kindle at all and paper copies can get pricy (and are way harder to read, for me at least) so certainly public domain is a good thing that should be preserved. I'm just saying, it's not a panacea when it comes to badly-done e-books