Cards are among the most coveted collectibles in the world, and can demand astronomical sums. But what makes cards valuable? This is the first in a series of videos that explore the determinants of card value. This particular video focuses on scarcity. In card collecting, the scarcity of a particular card – that is, the number of copies in existence – is strongly correlated to how valued it is within the collector community. This videos shows how and why scarcity matters – from a rare 1909 Honus Wagner card to a modern short-print.