paperbacks are lighter... they fit into purses and backpockets... they get beaten up and worn. Hardcover books are not mobile. They belong on a bookshelf or library. The more "elegant" the book, the more the book is "bookshelf-worthy", then the better the chances are that the hardcover will be pricier. If it's a book made for convenient reading then the paperback has a higher market value.
Encylopaedia Britannica... Charles Dickens complete works... Alexis deTocqueville's Democracy in America... Adam Smith's Wealth of Nations.. collectible hardcover editions will be worth way more than the paperbacks!
Someone help me understand this one. This book sells used paperback from $89-$400+Sex in the South: Unbuckling the Bible Belt....yet, you can pick up the hard copy for only a few bucks. It blew me away, and I can't figure it out. I just heard it mentioned on a Dr. Phil rerun on OWN and thought it would be a laugh. Now, I'm perplexed.