Lootbag command
From ThresholdRPG Wiki
With this command, you may designate a container as a loot bag. This means that when you are at a vendor, you may use the abbreviated sell command, sell loot to sell all of the items from your loot bags. Containers which leave your inventory are automatically removed of their loot bag designation.
This command works well with the bagcheck command which will help you see the contents of items that are bagchecked.