Those who haven’t yet gotten around playing World of Warcraft, now you can buy World of Warcraft and get the Burning Crusade expansion free here.
Select both games in the landing page, to qualify for the promotion, then go to the cart and check out.
After ordering, don’t forget World of Warcraft: Wrath of the Lich King Expansion Pack and World of Warcraft: Cataclysm expansions to reach lvl 85 and fly in Azeroth.