#8 - Jan. 28, 2011, 5:56 p.m.
The cost for Wrath of the Lich King is $39.99 USD, Jeagerjaques, which is what you would pay if you purchased the upgrade from us.
You may wish to locate a retail store near you that may have the game on sale. If you would rather purchase an authentication key only, be extremely cautious when doing so from a third-party website.