The value of a complete set of 1991 Topps baseball cards can vary quite a bit depending on the condition and grade of the cards. Topps released 792 total cards as part of their main flagship 1991 baseball card set. This included cards #1 to #792 with player, manager, coach, and team cards along with various inserts.

To give the most accurate valuation, it’s important to assess the condition and grading of the full 1991 Topps set being considered. The top grading service is Professional Sports Authenticator (PSA) who grades cards on a 1-10 scale. A complete set in PSA Gem Mint 10 condition, meaning perfectly centered with sharp corners and no flaws, would be an extremely rare find worth anywhere from $15,000-$25,000 or more depending on popularity and demand.

It’s very unlikely an entire 1991 Topps set would grade that highly. Most complete sets sell in the $3,000-$7,000 range depending on overall condition with many cards grading from PSA 7-9. Sets that have primarily lower graded cards from PSA 5-6 would value closer to $1,000-$3,000. Anything below a complete PSA 5 set would significantly decrease in value.

In addition to set condition, certain key rookie and star player cards can make a big impact on valuation. The 1991 Topps set featured major rookie cards like Chipper Jones (#500), Jim Thome (#234), and Bobby Higginson (#232). High graded versions of these rookies alone could add $500+ each to the value of the set depending on the grade. Other valuable individual cards include Ken Griffey Jr. (#1), Nolan Ryan (#113), and Cal Ripken Jr. (#159).

Supply and demand also affects pricing. The 1991 Topps set had a large production run so it’s not as scarce as some earlier sets. Interest has grown in the vintage 1991 cards over time so prices have appreciated. Another factor is whether a set is complete with all inserts, promotional cards, and special parallels included which can further enhance value.

In summarizing, a complete 1991 Topps baseball card set in average mid-grade condition around a PSA 7 average would realistically sell in the $3,000-$5,000 range based on current market trends. A higher graded full set at the PSA 8-9 level could bring $5,000-$7,000 or more with the right combination of star cards and set completeness. The very best of the best PSA 10 sets would command prices above $15,000 but finding one at that level intact is exceedingly rare. Proper assessment of condition remains key to accurately valuing any full 1991 Topps set.

While prices can vary, a complete 1991 Topps baseball card set in solid mid-range condition is generally valued between $3,000 up to potentially $7,000 or more for a premium quality graded set depending greatly on overall condition, popularity of individual key cards included, and supply and demand trends in the collectibles marketplace. Careful examination of each card is necessary to reliably put a price estimate on this desirable full vintage baseball card collection from 1991 Topps.