Pick the cheapest object if there is one or show you where the two cheapest objects are in your bag if it's hard to tell.
Suggest bag space optimizations within the group. If your teammate also has GreyHandling, communicate automatically with them so you know exactly what they have.
Track what your teammate loot to suggest mutually beneficial exchanges. Talk with other GreyHandling users to get real values (For items that they consider as junk and that you also have).