I remember knowing somebody who was hoarding Gregg Jefferies rookie cards, figuring to one day cash them in to pay for his kid's college tuition. I said, "Don't you realize that there are many people doing this? And because of supply and demand, those cards are going to be virtually worthless, even if Jefferies becomes the next Ty Cobb?" Deaf ears. If Mickey Mantle is worth thousands, then so must Jefferies. When I was very young, I thought that each of my comic books would become very valuable thirty years later, since Golden Age comics were selling for so much. I wasn't much past my tenth birthday when I realized that the supply of Marvel Two-In-One would always be high, but the demand would always be low. Supply and demand is a worthwhile thing for people to understand. And it's not even a difficult concept.