Opinions expressed by Forbes Contributors are their own. Dave Knox is a writer focused on startups, tech, innovation, and CPG. PSA, which authenticates and grades collectibles, has seen a surge in ...

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

According to grading company PSA (Professional Sports Authenticator ... why he’s even appearing in baseball sets). As a result, his total number of cards on the market, and number of graded ...

Whether you just want to see the 1987 Topps baseball checklist ... it would cost me to have these cards, most of which are worth less than a dollar, graded by PSA, but with TCDB all I had to ...