The word 'rare' has about as many definitions as there are people on this planet. One man's 'rare', however, could well be anothers' 'also-ran'.
Rare is a 'hot button' word that has a lot of clout in terms of influencing buyer behaviour. It relates to how we perceive 'scarcity' and just as the image in this post will at first be perceived to be warped, careful examination reveals another truth.
The word 'rare' can warp our perceptions just as the above image does. It has about as much power as the words 'free' or 'sex' and belongs to a family of words that have been proved to trigger certain forms of human behaviour.
Rarity is also a concept much open to abuse by sellers who use it as part of their speil to hook the unwary and unsuspecting.
In this essay on rarity, I explore its meaning as it applies to collecting OMega Constellations and offer a set of criteria that may be useful in determining comparative rarity of various Constellation models