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3. You agree that you will not
(5) buy or sell for "real" money or exchange gold, weapons, armor, or any other virtual items that may be used in World of Warcraft outside the World of Warcraft platform;
Gold and other in-game properties belong to Blizzard, and is not for the player to sell:
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XV. Ownership. All title, ownership rights and intellectual property rights in and to World of Warcraft (including without limitation any user accounts, titles, computer code, themes, objects, characters, character names, stories, dialogue, catch phrases, locations, concepts, artwork, animations, sounds, musical compositions, audio-visual effects, methods of operation, moral rights, any related documentation, "applets" incorporated into World of Warcraft, transcripts of the chat rooms, character profile information, recordings of games played on World of Warcraft, and the World of Warcraft client and server software) are owned by Blizzard Entertainment or its licensors. World of Warcraft is protected by the copyright laws of the United States, international copyright treaties and conventions, and other laws. All rights are reserved. World of Warcraft may contain certain licensed materials, and Blizzard Entertainment’s licensors may protect their rights in the event of any violation of this Agreement.
If you're found guilty of violating their TOS, they can immediately terminate your privelege to use their software:
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2. Blizzard Entertainment reserves the right to terminate this Agreement without notice, if you fail to comply with any terms contained in these Terms of Use and/or the World of Warcraft End User License Agreement. In case of minor violations of these rules Blizzard will provide you with a prior warning of your non-compliance prior to terminating the Agreement. If, however, your behavior is utterly inacceptable, in particular if it endangers the gaming experience of other players, Blizzard is not required to provide you with such prior warning. A behavior is considered utterly unacceptable in case of a serious violation of the Terms of Use and/or the World of Warcraft End User License Agreement. Serious Violation would include a violation of Section III above. Also, note that in the event that Blizzard Entertainment terminates this Agreement for breach of these Terms of Use, any right to any and all payments you may have made for pre-purchased game access to World of Warcraft are forfeit, and you agree and acknowledge that you are not entitled to any refund for any amounts which were pre-paid on your Account prior to any termination of this Agreement.
Also, if your actions are deemed to "undermine the legitimate operations of World of Warcraft", this act is "a violation of criminal and civil laws", giving Blizzard "the right to seek damages from any such user to the fullest extent permitted by law."
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4. You may not institute, assist, or become involved in an attack upon any World of Warcraft server or otherwise attempt to disrupt the World of Warcraft servers. You may not institute any such attack which results in the disruption of any other player’s World of Warcraft experience. ANY ATTEMPT BY YOU OR ANY OTHER PLAYER ON AN ACCOUNT TRACEABLE TO YOU TO DAMAGE WORLD OF WARCRAFT OR UNDERMINE THE LEGITIMATE OPERATION OF WORLD OF WARCRAFT IS A VIOLATION OF CRIMINAL AND CIVIL LAWS AND, SHOULD SUCH AN ATTEMPT BE MADE OR ASSISTANCE FOR SUCH AN ATTACK BE PROVIDED, BLIZZARD ENTERTAINMENT RESERVES THE RIGHT TO SEEK DAMAGES FROM ANY SUCH USER TO THE FULLEST EXTENT PERMITTED BY LAW. You may not, whether intentionally or unintentionally, violate any applicable local, state, national or international law or regulation in connection with your use of World of Warcraft or the Service.
Taken from their TOS
http://www.wow-europe.com/en/legal/termsofuse.html
