I've been thinking about it. I have a house crammed with books, too, and they're beginning to fall apart. I love classic science fiction, lots of it published first in the 1930's to the 1960's. The stories would first be published in pulp magazines (at this point very fragile in the original due to acid paper), maybe collected in hardcover (collectible and now expensive) or, after 1955 or so, in paperback (falling apart due to acid paper). Small publishers are now putting out collections on good paper that will last longer (Here's an example) They tend to be expensive. However, collections of short stories on Kindle are pretty cheap. The situation is more muddled with more recent titles. I can buy this title in paperback for a penny plus shipping ($4.99, I believe) or in hardcover for 23 cents plus shipping (same shipping price) if I'll take a chance on a used book. I'd probably go for the hardcover, for the pleasure of holding the book and economics combined. But for other titles I'd probably go for the Kindle version over a paperback. If I had a Kindle. Which I don't yet. Meanwhile, I have a wall of collectible science fiction that is crumbling. I'll watch this thread, for sure.