A limited supply does funny things. For I want the limited edition car, the members-only pool, the VIP seating, and the only Presidential suite available.

It is also why I bought that one useless eCourse that was only open to new members for 30 days.

And, come to think of it, also why the panicked populous of Texas cleans out grocery stores at the mear possibility of snow.

The specter of unavailability moves our emotions.

If I am on the fence about a purchase, taking away my option to buy it tomorrow is a persuasive move.

After declining the invitation, my friend wondered why I seemed so intent on a visit. I was forced to admit that, no, I had never been inclined toward the idea of a temple tour before, that I had no questions about the Mormon religion I wanted answered, that I had no general interest in the architecture of houses of worship, and that I expected to find nothing more spectacular or stirring than I might see at a number of other temples, churches, or cathedrals in the area. It became clear as I spoke that the special lure of the temple had a sole cause: If I did not experience the restricted sector shortly, I would never again have the chance. Something that, on its own merits, held little appeal for me had become decidedly more attractive merely because it would soon become unavailable.

-Robert Cialdini, Influence