What do you think of this idea: A rarity score that is based upon market data like the price of the game, the number of listings during the past year, the number of copies produced, etc.
Most rarity scales now seem to be someone's opinion about how rare a game is but they are subjective. This rarity scale would be based on an equation that everyone would know so people can see why a game is rare or why it isn't. This would make the rarity rankings much more transparent.
A very simple example: A game sells for $100 on average, there have been 20 sales in the past year, there is 1 listing available right now, and 50,000 copies of the game were produced. The equation would then pop out the rarity score of 4.
The tricky part would be getting the equation right so it gives good results but what does everyone think of the idea in general? Do you think it would be a good idea?
Lastly, what type of scale do you like best: 1-10, 1-100, 1-5 stars, etc