Interesting discussion happening here!
I sort-of have an e-reader - I can pay to download stuff to my laptop or my netbook if I want, and I can access Google Books for free with them - but I never use them that way. I prefer to read on paper, regardless of price. It's just me.
However, I do think about price when I'm thinking about buying a book and deciding whether to go for the paper or hardcover versions. If I think I might get it signed at some stage, I go for hardcover. If I think I might get the whole series, I try to make it match - either all paperback, or all hardcover, and in that case, the price of the two versions comes into play. But it's never the only factor. And only when I'm saving for something specific do I go cheap and either get the paperback or borrow from the library.
I invest in books.
Clothes, on the other hand, ALWAYS come to me second-hand.
