2月1日开始，美服和欧服魔兽世界燃烧远征同时开放在线购买，玩家只需在线付款，即可下载游戏客户端并获得CDkey。

燃烧远征 TBC 的 CDK 价格应该降低了，但是也许封号的危险更大了

Blizzard  provide a new service that players can buy account upgrade keys and download the game client for World of Warcraft: The Burning Crusade directly through the account management section of www.worldofwarcraft.com.

You can now buy account upgrade keys and download the game client for World of Warcraft: The Burning Crusade directly through the account management section of www.worldofwarcraft.com. With this new direct online upgrade method, you don?t even need to leave your desk if you decide to upgrade to The Burning Crusade and join more than two million players who are already adventuring beyond the Dark Portal.