Anirvan Chatterjee: "We've noticed significant changes in the pricing landscape in the used and rare book markets. On one hand, we're seeing a flood of very cheap titles, often less than $0.25, where the seller makes the profit from the shipping charges," says Chatterjee.

"On the other hand, we're also seeing increasingly price-competitive international bookselling, where it can be cheaper to buy a book from another country, in spite of the relatively larger shipping cost. Bundling shipping prices can make clear the real cost of a $0.01 book, while making it a little less scary for a Californian considering buying a title from London."

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