The 1990 baseball card season produced some of the most iconic and valuable cards in the hobby’s history. Several rookies from the late 80s and early 90s made their debuts on cardboard in 1990, while established stars like Ken Griffey Jr. and Barry Bonds appeared in designs that would become highly sought after in the decades since. Let’s take a closer look at some of the most valuable 1990 baseball cards on the market today according to PSA and Beckett population reports and recent auction prices.

Ken Griffey Jr. Upper Deck #1 RC (Rookie Card): Widely considered the most iconic baseball card of all-time, the Ken Griffey Jr. Upper Deck rookie is the undisputed king of the 1990s. With its vivid photo and groundbreaking Upper Deck design, this card set the standard for modern rookie cards. High grade PSA 10 versions routinely sell for $10,000+ today. Even well-centered PSA 9s can fetch $3,000. Griffey’s dominant play and popularity as “The Kid” ensured this would become the most valuable 1990s card.

Frank Thomas Stadium Club Gold #46 RC: While not quite as popular as Griffey, Frank Thomas established himself as one of the decade’s best hitters. His gold-bordered Stadium Club rookie is one of the most visually striking cards from 1990. PSA 10s have sold for $6,000, with PSA 9s bringing around $2,000. Condition is harshly graded on these, making high grades very difficult to attain.

Alex Rodriguez Bowman’s Best #73 RC: A-Rod burst onto the scene in Seattle and was touted as a future superstar from the start. His colorful Bowman’s Best design is iconic of the early 90s. PSA 10s have topped $5,000 at auction when elite examples emerge. Most PSA 9s will reach $2,000-3,000.

Roberto Alomar Score #73 RC: As a second year player, Alomar was already establishing himself as a perennial All-Star. His 1989 Score rookie takes on greater prominence since it was among the final issues before Score’s untimely demise. PSA 10s have reached $3,500, with most PSA 9s settling in the $1,000-1,500 range.

Jim Abbott Score #640: Abbott’s inspirational career overcoming the loss of his right hand at birth made his rookie one of the most feel-good stories of the late 80s/early 90s. PSA 10s have sold for $3,000 in the past few years, with PSA 9s around $1,000. Condition sensitivity limits populating the true gem state.

Barry Larkin Score #660: Larkin emerged as a superstar shortstop in Cincinnati and his 1990 Score issue gained notoriety as one of the set’s main “hits.” High grade PSA 10s have reached $2,500, with most PSA 9s in the $800-1,200 range based on recent eBay sales.

Ken Griffey Jr. Fleer #161: While not his true rookie card, Griffey’s second year Fleer issue is equally iconic from the set. Its nostalgic design remains highly sought after by Fleer collectors. PSA 10s have brought over $2,000, with PSA 9s commonly around $800.

Roberto Alomar Fleer #162: As one of the stars of the “Fleer Funny Guys” subset, Alomar’s card became an iconic encapsulation of the bushy browed second baseman’s personality. PSA 10s have reached $1,800, with most PSA 9s in the $600-900 range.

Don Mattingly Topps #126: Coming off his ’89 AL MVP campaign and still in the prime of his Yankee career, Mattingly’s 1986 Topps Traded appearance was a true superstar issue of its day. PSA 10s have recently sold for $1,500, with PSA 9s averaging around $600-800.

Kirk Gibson Fleer Update #U-21: One of the set’s main “hits,” Gibson’s card memorializes his legendary 1988 World Series Game 1 home run. PSA 10s have gone for over $1,300 recently, with most PSA 9s around $500. Condition challenges keep the truly pristine away.

The 1990 season was a high water mark of designs, rookie debuts, and future Hall of Famers that still resonate strongly among collectors today. While Griffey and Thomas rookies remain universally coveted, other stars like Alomar, Larkin, and Gibson offer alternative targets. Considering the vintage, condition sensitivity, and rarity of true high grades – these 1990s stand among the most valuable baseball cards money can buy.