It depends on the country... While it is immoral to sell virtual goods it's not necessarily illegal, however recently the Chinese government outlawed this making it illegal in china.
The reason behind this is that online games have created a new type of bully, the cyber bully... It is not uncommon for school kids too beat up other kids for virtual goods that they want in game, instead of robbing your dinner money they now rob your virtual gold.
It is however illegal to steal virtual goods, recently a man was imprisoned for stealing thousands of pounds worth of Habbo Hotel furnishings from online players.
Specifically, any sale of virtual goods (gold, characters, items) in World of Warcraft is forbidden by the Terms of Service, and can get you banned. Furthermore, since these are legally property of Blizzard Entertainment, you also run the risk of being charged with theft.
Blizzard Entertainment has also disallowed making advertisments for third parties, or selling goods from third parties in WoW, because they have made previous arrangements about in-game advertisments.
Yes, trading real money for in-game gold is banned in World of Warcraft. There are some ways around that, some legal and some not so legal.
Gold.
Buying any ingame goods for real money, or real goods with virtual money, is against the policy of Blizzard and might get you banned.
No, you can not buy my world of warcraft account, i have put too much time and money into it.
No, if you cheat by buying gold, you do not get to keep what you bought if you are caught. In fact, you could very likely be banned outright for it. Be safe, Don't Cheat.
The money of course.
Do auctions or grind on enemies for money
$30,000
mining and herbing
A Retail World of Warcraft Server costs money. In the USA it is $15.00 a month +Tax and you have to buy the games and get an account. Once you get a subscription and buy the games you then can Connect to a Retail World of Warcraft Server.
Don't buy gold. It ruin's the World of Warcraft economy, most of the time the money comes from exploits in the game, and it is Illegal.
herb or mine and sell them on the auction house it is really easy money
Disney dollars? World of Warcraft gold? Monopoly