As of 4.0.6, the function only return 10 categories. Projectile and Quiver have been removed.
GetAuctionItemClasses() => "Weapon", "Armor", "Container", "Consumable", "Glyph", "Trade Goods", "Recipe", "Gem", "Miscellaneous", "Quest"
--LaoTseu (talk) 23:10, 8 February 2011 (UTC)
