Really, this is just Econ 101, supply and demand. To illustrate the rule, I'll use the example of a 1989 Upper Deck Ken Griffey, Jr., card. 1989 Upper Deck Ken Griffey, Jr. / Jason A. Schwartz ...

but the real buzz was around the first card in the set, a card that remains synonymous with the set and may as well be the face of 1980s card collecting: the Ken Griffey, Jr., rookie card.

These collectibles lose their value as soon as you leave the ... Even a baseball card featuring a star player, like a 1989 Ken Griffey Jr., is only worth around $100. Home run hitter Mark McGwire's ...

Being part of the only active father-and-son NBA duo puts Bronny James in a unique position. While Ken Griffey Jr. competed ...

Consider that last season’s NBA Rookie of the Year Victor Wembanyama already has 2,505 card types and nearly 400,000 graded, ...

Poetically, Ken Griffey and Ken Griffey Jr. — MLB's first father-son duo — were on hand. As it turns out, the moment was more than just a photo opportunity for the father-son pairings.

Matt Shaw is currently representing Team USA at the Premier12 Tournament, and he's putting up numbers only seen by Ken ...

Very few athletes have had to live in the shadow of their father’s legacy like Los Angeles Lakers rookie Bronny James has had to do. But perhaps the one who has done so the best, MLB Hall of Famer Ken ...

and Ken Griffey Jr. will be there to witness it. The first father-son duo to play together in Major League Baseball plans to be in attendance at the Lakers' season opener in their downtown arena, ...

Ken Griffey Jr., born on Nove­mber 21, 1969, in Donora, Pennsylvania, grew up in a base­ball-loving family. His father, Ken Griffey Sr., was also a Major Le­ague Baseball player. The Se­attle ...