By rare I mean either nobody else has it or very few people possess it. I have seen veblen goods and snob effect. I use them whenever I have the need for such a concept but do so when I have time to explain it to the listener.
Is there an adjective or noun that anyone here knows that would describe anything to be desirable only because of its exclusivity?
On a different note, is there a word for the desire to own such unusual, expensive or unique goods?