Since you can't bank them (you said they were already banked once),you can't transfer them either. 5 points aren't enough to deposit into RCI (or to reserve anything in the Disney or Concierge Collections) & brokers require a minimum that is much more than 5, so you'd have to rent on your own (by adding more points to the 5 extra).
So unless you are willing to add enough points to the 5 extra to reserve a night somewhere (which you could rent or give away), you'll just have to let them expire.
I know it's hard to wave good-bye to those points, but sometimes, that's just the best option.