In the vein of people "trading" ingame items for real cash value, I think the [url=http://www.bungie.net/en/View/Bungie/terms]terms of use[/url] has always been explicit: [quote]By way of example, and not as a limitation, you agree that when using a Communication Service, you will not: Advertise or offer to sell or buy any goods or services for any business purpose, unless such Communication Service specifically allows such messages. Unless otherwise specified, the Bungie Services, Bungie Mobile Apps and Software are for your personal and non-commercial use. You may not [...] sell any information, software, products or services obtained from the Bungie Services, Bungie Mobile Apps or Software.[/quote] The terms also detail virtual currency and virtual items, which is worth reading. I am no authority on this, but to me it seems that buying or auctioning items for profit is not a good thing on the bungie.net forums.