[Secrets]

Short of the item being no-drop, you should be always, always, ALWAYS be rolling with the intent to sell as predefined loot rules. Plat has value, your character being a certain class in the group does not.

NBG on items you can trade is an example of people who think they are better than others. It exists to fulfill a desire to take a shortcut over other players.

Best example of this:

You get an FBSS to drop. You could buy 20 items for the price of that FBSS if you're shoddily geared as a <class here>, or you could equip it as a <class here>.
<other class> claims need before greed, who is a melee who would actually use the item. <other class> has now wasted your time and money by taking the item over you for a small upgrade for them. Chances are, you'll never group with that person again and you're higher level as a result of that group without a chance at gear.

I sincerely hope Pantheon learns that tradeable items are okay, but shared group loot of any item is not. This is one of the few mechanics problems in MMOs that are largely solved by individual, personal roll systems on NPC death.