Amazon Goldbox deal of the day currently lists World of Warcraft (Classic) at a 75% discount — only $9.99.
If you wish to upgrade Wrath of the Lich King into World of Warcraft: Cataclysm, or wish to gift it to a friend or family member this is a good chance. Free super saving delivery on $25+ orders. The offer expires Tuesday, May 29th at around 9pm EDT (New York, -5GMT) / 5pm PDT (California).