It would be nice to be able to sell on vendors and trade containers with contents included. The mechanism to examine an individual item to see its crafting detail already exists and could potentially be utilized to see the container contents. Also existing is the ability to lock an item into your inventory and you cant remove it. This mechanism might be able to be used to double-click a container on a vendor or in a trade window to bring up the contents for review. Not being able to sell or trade containers with contents makes trading or selling prepackaged goods very difficult. While not necessary, this would be a great feature to have.