Ok go to a wow trading website (im not gonna link anyone on purpose). [also it doesnt hurt to have a few inactive 70's armory links just in case]
Now when you get there post a topic sayng you will trade 10,000 Gold [think of a random server ] for gametime [ think of how much you want ]
When somebody contacts you say to them that the gold is on the account you want to put gametime on, so they have to give you the time first [this is why i like to specifi gamecard instead of just gametime] [ if they ask you for a char just give them armory to a random innactive 70]
add the gametime block them on msn [AIM, YAHOO MSG. OR OTHER] and enjoy your free gametime