Hobby Education: Traits That Smart Buyers Evaluate Before Buying Cards (Part 2)
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Welcome to Part Two in this short series where we explore multiple elements, beyond just a cards grade, that smart buyers should consider before they pull the trigger.
Part One can be found at Hobby Education: What Smart Buyers Look for Before Buying Cards (Part 1) which analyzed how card grades are important, but so too are other elements and features that make a card feel right for a buyer and collectors. These include color match, cameos, player pairings, and the jersey the player is wearing.
In Part Two addresses four additional factors, but these are elements that make a card feel special. These distinguishing features can dramatically impact the value of low-grade cards or make a card that only appears average on a listing turn out to be fantastic.
Jersey Number Match
A jersey number match happens when the serial number of a card matches the player's jersey number. For any player with a non-zero jersey number, you can find jersey match serial numbered cards that frequently sell for a premium.
One card that demonstrates the jersey number effect perfectly is LeBron James' 2003-04 Exquisite Collection Rookie Patch autograph card (#78). At the October 25, 2021 Goldin Auction, two BGS 8.5 copies numbered to 99 were sold. One had serial number 23/99, the other was numbered 32/99.
The one serial numbered to 23, which matched LeBron's rookie Cavs jersey number, sold for nearly double what the other one sold for. The 23 sold for $2.64M, while the 32 sold for roughly $1.27M. The same grade and the same digits, reordered, yet the price difference was staggering!
Patch Traits
For cards with game-worn elements, typically in the form of patches, the patch traits themselves can have a big impact on the card's value, since not all patches are created equally. Patch traits can have an impact on eye appeal as well, for better or worse.
There are two general rules of thumb with game worn elements and patch traits:
1. More 'Patch Colors' Is Better
Collectors tend to love color, variety, and complexity. When you look at a patch or other game used element, look for two, three, or more color elements.
For example, the above Joe Burrow autograph patch rookie card on the left, with a three-color patch sold for $103K, while the exact same card on the right with just two colors didn't even get half that. Just a slight sliver of additional color can double a card's value.
2. Unique elements fetch a premium
The more unique, the more valuable. Case in point, the Bronny James rookie card with the "Leave" patch. This one-of-a-kind card sold for $1,802 on July 8, 2025. Quite the premium compared to similar cards, like a much less unique tie-dye copy serial numbered to 25 that sold for $81 three days earlier.
Autograph Extras
A standalone autograph is fantastic, but when players include a little extra something with that auto the card's value can easily be kicked up a notch. This ties back to the same underlying theme as why many collectors prefer some patches over others. The scarcer and more unique the autograph, the more the card worth in the eyes of most buyers.
There are several strong examples of a little something extra included in an autograph, from the "Best Wishes" Jordan rookie to a handful of "Good Luck" Joe Namath cards. Victor Wembanyama sometimes includes an alien with his autograph, which even his opponents can appreciate.
JOKER: “I want the alien”
— NBA (@NBA) February 16, 2026
WEMBY: “Say less.”
Nikola Jokić asks Victor Wembanyama to draw an alien after he signs his NBA All-Star jersey! pic.twitter.com/rTMKA7K3rV
But one of the best extras is on the Tom Brady Bowman baseball card (12/50), where he includes "If baseball doesn't work out, there's always football."
Brady has a few extras he likes to throw in, and those little extras can go a long way in the eyes of a collector. Case in point, a Tom Brady and Peyton Manning dual autograph card recently sold on eBay for $32K, more than $14K higher than the next highest-selling dual auto featuring these two legends. One clear reason why was the extra inscriptions from both players.
Eye Appeal
Eye appeal might be the hardest one to explain since it's also the most subjective. Generally speaking, eye appeal is the overall visual attractiveness of a card.
Beauty, as they say, is in the eye of the beholder, so eye appeal can vary significantly from one collector to the next.
However, there are some generally accepted principles that lead to higher eye appeal including the card's centering, crisp images (as opposed to blurry or faded), color, and damage type (assuming there is damage to some degree).
Eye appeal is a hotly debated topic, especially among vintage collectors. For more on eye appeal, check out The Art of Eye Appeal.
Collectors who understand these details, however small, can consistently spot value others may miss.
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Conor is a life long sports card enthusiast who started collecting in the early ’90s, inspired by hometown heroes like Larry Bird, Paul Pierce, Tom Brady, and David Ortiz. Like many ’90s hoops fans, he also started building (and continues to build) a modest Michael Jordan collection.