GUILDWARS
You may not sell or auction any Guild Wars accounts, characters, items, coin or copyrighted material.
http://www.guildwars.com/legal/user-agreement.html
WOW
sell, grant a security interest in or transfer reproductions of the Game to other parties in any way not expressly authorized herein, nor shall you rent, lease or license the Game to others;
http://www.worldofwarcraft.com/legal/eula.html
SW galaxies
You may not buy, sell or auction (or host or facilitate the ability to allow others to buy, sell or auction) any Account or any Game characters, items, credits or copyrighted material or any other intellectual property owned or controlled by us or our licensors.
http://starwarsgalaxies.station.sony.com/tos.jsp