On Sunday, March 7, U.S. customers woke up to discover that a huge number of normally expensive hardcover comics were available from Amazon.com for $14.99 apiece. Later in the day, some were discounted even further, to $8.24. Since these books included the Marvel Omnibus line, which normally is cover-priced at $100, lots of people jumped on the bandwagon and ordered wildly. Other affected publishers were IDW, Dark Horse, and Image, both preorders and current releases. As Bully points out, all of the publishers whose works were included were distributed by Diamond Book Distributors, which suggests a massive automated data glitch of some kind.
Full blog entry here.