I sell gold in WoW to buy tokens in WoW Cataclysm, which can only be used to add game time. IT CANNOT BE USED TO ADD BATTLE.NET BALANCE.
You need to have WoW Cataclysm installed to be able to log in, create a character, receive the gold, and buy the token.
I can also trade gold from WoW Cataclysm (Grobbulus server) for gold in WoW Retail. I’m open to offers.