The 1991 Upper Deck baseball card set was the third release of Upper Deck cards following their successful initial launch in 1989 that changed the baseball card industry. Upper Deck became the forerunner in ultra-premium cards that focused on producing high quality and innovative cards at a much higher price point compared to the traditional Topps and Donruss releases of the time. The 1991 Upper Deck set continued establishing the brand as the pinnacle of baseball collectibles for the 1990s.

The set included 792 total cards comprised of 660 base cards and 132 highlight/insert cards. The design theme featured bold team logos at the top in team colors with headshots of players below. Statistics and player information were printed on the bottom half of each card. The set had 200 rookie cards and debuted cards of future Hall of Famers including Frank Thomas, Mike Piazza, Edgar Martinez, John Smoltz, and Jeff Bagwell. Highlights included the Error card that mistakenly printed Stats from 1990 instead of 1991.

Print runs for Upper Deck sets were much lower compared to competitors which helped increase the long term value potential for collectors. The exact print run for the entire 1991 UD set has never been officially disclosed but based on population estimates from tracking services like PSA/BVG, Beckett, and COMC the full print run was likely between 1-2 million sets. The much lower supply compared to the tens of millions of traditional issues helped Upper Deck cards retain better long term value in the resale market.

Some of the most notable and valuable cards from the 1991 Upper Deck set include the Frank Thomas rookie card, which graded mint condition examples have now eclipsed $10,000 in recent sales. The Mike Piazza rookie is also an extremely desirable card, with PSA 10 specimens reaching as high as $6,000. Rookie cards for Hall of Famers Jeff Bagwell and John Smoltz also command prices well over $1,000 in top grades.

The Barry Bonds card from 1991 Upper Deck is also highly sought after due to his massive career home run total and his controversy during the steroid era. High graded examples with his Pirates uniform change hands for $1,500-$3,000 depending on condition. Errors or photo variations that were accidentally included also carry premiums, such as the Cal Ripken Jr error card which swapped his photo for another Oriole and has sold for over $5,000 in pristine condition.

Beyond the star rookies and errors, there are also many valuable short prints and parallels from the 1991 UD set. The Brett Butler card is one of the most famous short prints, with only 10-15 copies believed to exist in a PSA 10 gem mint state. It has realized auction prices well in excess of $20,000 when fresh examples come available. The Mark McGwire traded parallel is also highly condition sensitive, with a PSA 10 copy selling for nearly $7,000.

Still after 30 years, the 1991 Upper Deck baseball set remains one of the most complete sets to collect from the brand’s early years. Prices have certainly risen from original MSRP of $1-2 per pack but finding high graded examples of stars is still achievable with patience and diligence searching the current market. The investment quality construction and timeless design has led to strong long term appreciation potential for collector grade samples. Among the earliest Ultra-modern issues, 1991 UD is highly regarded for its star power, variations, and importance as an early upper tier release that set the standard for the modern card collecting hobby.

While not quite as iconic or valuable as the pioneering 1989 set overall, the 1991 Upper Deck complete base and insert card collection remains a highly desirable target for Advanced collectors three decades later. The coveted rookie classes, rare errors/parallels, and the brand’s unmatched print quality assurance make it one of the most investment worthy vintage issues released before the modern boom. With authenticated population reports and auction records to assess its long term performance over time, 1991 UD has proven to keep pace among the trading card industry’s blue chip offerings from the early 1990s zenith of the card collecting passion.