Blizzplanet talked with an Amazon Support Representative to confirm the World of Warcraft: Mists of Pandaria Collector's Edition is currently available through November for only $39.99.
This highly-sought Collector's Edition is usually priced at $79.99. Under normal circumstances, these sell for over $200 in eBay when copies have sold out at local and online stores.
World of Warcraft: Mists of Pandaria launched two months ago, on September 25, 2012.