For common courtesy players, generally, select "greed" for a roll to try and get the special drop.
Gold will always be needed in the game and selling what isn't needed from loot will keep the player's pockets full. Players should turn on the setting "auto-loot" in their settings so that they don't have to click on every individual item when they loot. Players should also be wary when looting in dungeons and raids with other players. For common courtesy players, generally, select "greed" for a roll to try and get the special drop. Selecting "need" is only supposed to be clicked by the player who genuinely needs the item.