Consider the second-hand (used) market for a popular economics textbook. New copies of the book sell for $100. The upward-sloping orange line labeled "S (After 1 yr)" shows the supply of used copies of the textbook one year after the release of the new edition.
Suppose that the pool of used textbooks grows further during the second year of the latest edition. Shift the supply curve to show what happens to the supply of used textbooks TWO years after the release of the latest edition. Assume demand does NOT change.