bees, I has a movie appear as "Unavailable" in my queue a few weeks ago. Chaos. It was never moved to my Saved and I never received that gray notification box at the top of my queue - until yesterday. When I refreshed my queue, suddenly Chaos was showing available again despite the notification that it was no longer available. Upon refresh it had been moved all the way to the very bottom spot, whereas previously it was in my top-20. So I immediately bumped it to #1, and today they shipped it to me.
So, if you're really wanting to see those particular movies yet are worried about their eventual unavailability, you might want to bump them to the top of your queue now.
No stock belongs in saved.
Low stock even if only one copy, belongs in the queue. Maybe as "unavailable," maybe as "Ridiculously long wait," but give us a chance, and let us decide where in our queues it belongs.