I buy a lot of books from used book stores. Fundamentally I'm only paying for the paper it's printed on as none of those fat proceeds($3.99 paperback) ever reach the publisher. Totally cool and legal.
When I'm following a new book that's coming out, I'll drop the $30 on the unnecessarily large hardcover with the thick paper that fluffs it up.
I have only ever purchased one eBook though, and it was an awful experience. I had to crack the DRM so I could read it on the same app I read all my other books on.
When I buy a physical book, I can put it on my shelf and share it with anyone I want. I can't do that with an ebook. And if I can't comfortably read the oversized print copy, I'm going to just go find a copy online.
I basically refuse to buy physical modern fiction due to the publishing industry making every physical copy as large as possible. I have old mass-market paperbacks that have twice the density per page, thinner pages, and overall more portable than the massive soft-covers with giant print that they sell today. They're just uncomfortable to read. I took a copy of "Death's End" and a copy of "Thinking in Jazz" by Paul F Berliner. From the outside, the two books have nearly the same dimensions. The latter weighs almost twice as much, has nearly 300 more pages, and the page density is nearly a third tighter. Why should both these books take up the same amount of space on my shelf? Why do publishers think they're so important as to take up two seats on the plane? Bring back smaller mass market formfactors ffs and I'll pay full price for their bullshit.
Publishing companies are making their products worse and worse to consume. As Gabe Newel says, it's a distribution problem.