Part of me really, really, REALLY wants to buy this thirty-eight volume sets of Shakespeare plays. It looks cool, it seems pretty durable, and the price is right. ($2.37 a book? That's cheaper than buying new paperbacks, and easier than hunting down all the fifty-cent books at garage and library sales.) I've never really liked the single-edition Shakespeare compilations; they always seemed like they would be a real hassle to read.
Storage space. Where the heck can I put thirty-eight more books? One of Amazon's customers pointed out "You will need a minimum of 26 ½ inches of linear shelf space for them all" and I just can't think of anyplace I have a spare two feet of shelving lying around.