Sports card collecting has exploded in popularity over the past few years. Whether you’re in it for the nostalgia, the thrill of the chase, or the investment potential, there’s never been a more exciting time to be part of the hobby. But as fun as it is to rip open packs or chase a grail card, there’s one concept every serious buyer and seller needs to master: comps.
Understanding comps—(recent comparable sales prices)—isn’t just helpful. It’s essential. Everyone wants to get a fair deal. If you want to avoid overpaying, maximize your profits, or simply trade fairly, comps are your best friend.
Let’s break down why comps are so important and how to use them to your advantage.
What Are Comps?
Comps refer to recent sales of the same or similar card. Think of it like checking Zillow before buying or selling a house—you want to know what similar homes in the area sold for, not what people are asking. Remember, something is only worth what someone is willing to pay for it.
The same goes for sports cards.
Compare like cards when checking comps:
- Ensure you are comparing similar cards whenever possible.
- Be sure to note the card year, manufacturer, whether it is a base or parallel, whether it has special features (such as a patch, autograph, or serial number), and whether it is a short print, a refractor, etc.
Where to find comps:
- eBay “Sold” listings
- 130point.com (great for eBay Best Offer accepted prices)
- Apps like Vintage Card Prices, Card Ladder, Market Movers, Alt, and others.
Just remember: listings aren’t sales. Asking $500 doesn’t mean the card is worth $500—what someone actually paid tells the real story.
Why Comps Are Important
For Buyers: As buyers, we all have limited resources. Whether you can only afford to spend a few bucks on cards every few months, or you regularly drop five figures every month, we all have a limited hobby budget. That’s why it’s important to understand comps. As a buyer, knowing comps helps you to:
- Avoid overpaying: Just because someone wants $300 for a card doesn’t mean it’s worth that. If the last five sold for $150, that’s your target.
- Spot undervalued cards: If comps are rising and you find a card priced under the market, jump on it.
For Sellers: As a seller, you want to maximize your revenue. At the same time, you need to keep inventory moving through the pipeline to free up capital to keep the machine rolling. As a seller, knowing comps helps you to:
- Price to sell: Overpricing kills sales. Accurate pricing, based on comps, moves inventory.
- Time the market: Understanding trends helps you know when to hold or list.
For Traders: Some trades are easy pull off. You have card A, I have card B, and we both decide to trade one-for-one. Easy day! But it’s important to know your card’s value to ensure a fair trade for both parties. This helps ensure both parties are satisfied with the outcome of the deal and there are no hard feelings when the deal is over. When trading cards, knowing comps helps you to:
- Make fair trades: Knowing both cards’ comps creates transparency and trust in deals.
How to Properly Check Comps
Checking comps isn’t just about typing a card name into eBay. You need to ensure you are comparing like items.
For example, are you comparing a graded card or an ungraded card (raw)? Is your card a limited-edition parallel version or a base card? Autographed or not?
Grading Matters
Not all grading companies are equal. The four major grading companies are PSA, SGC, CGC, and BGS. However, there are dozens of other grading companies, some of which have gone out of business or have poor reputations for overgrading cards or for grading altered cards and reprints. When in doubt, stick to the major grading companies.
Prices can vary significantly even among the major grading companies. In general, cards graded by PSA often command the highest premium, though cards graded by SGC are frequently in a similar price range or may even exceed PSA graded prices, especially in the Vintage and Pre-War card markets.
The card grade matters. A 10 GEM MINT card can sell for many multiples of a card graded 9 Mint, even within the same grading company. As a rule of thumb, the higher the grade, the higher the price. The difference is most notable in the higher grades. Some cards may show little variance in average sale price in lower grades. Prices can even vary significantly within the same grade, particularly in vintage cards, where a card with above-average eye appeal may fetch a significantly higher price than cards in the same grade.
Card Condition Matters
Buying ungraded, or raw, cards is more subjective and requires the buyer to understand how to assign a rough value based on the card’s condition. Familiarize yourself with how the major grading companies grade cards. They generally focus on four areas: Corners, Edges, Surface, and Centering.
- Corners: Are there noticeable condition problems with the card, such as soft or rounded corners?
- Edges: Are the edges clean and straight, or rough and jagged? (Be sure to familiarize yourself with rough-cut vintage cards, in which some cards came from the factory with rough-cut edges. This is considered a feature, not a bug, for these cards!)
- Surface: Are there any creases or surface wrinkles? Are there any indentations or sections with paper loss?
- Centering: Is the card centered properly?
Are You Looking at Base Cards or a Variation?
In the early days, card manufacturers only printed base cards. However, variations exist for some vintage cards. The most common examples occurred as errors that were caught at some point during the production run, then later corrected. There are several examples of 1969 Topps cards with team names in both White and Yellow letters. The difference in rarity and value can be significant.
There are many more variations in modern sports cards. These may include Parallel Cards, Numbered Cards, Refractors, Foil Cards, Patches, and many more. It can be a full-time job keeping up with the numerous card company variations these days. But it’s crucial to know which card you are looking for so you can better understand how to value it, whether you are buying or selling.
Timing Can Impact Card Values
The vintage card market is more stable than the modern one, but prices can change quickly in both markets.
How Timing Impacts Vintage Card Values
Vintage card values typically change more slowly than modern card values. However, they can change with news of a player’s death or when a specific player or a particular card receives significant media attention. The news of a player’s death often causes a spike in card and autograph values. It may take some time for card prices to settle, and they usually settle near the price before the player’s passing. However, autograph prices often spike higher than card prices, and when they settle, the price floor is usually higher than it was when the player was living. This makes sense because the market supply becomes fixed at that point.
How Timing Impacts Modern Card Values
Modern card prices can change daily or weekly, especially when a player or his team is in the news, wins a major award (MVP, ROY, CY Young, etc.), or their team reaches the World Series, Super Bowl, or NBA Finals. Sometimes, there is a run-up in card prices leading up to these major events, only for prices to drop shortly afterward.
Check Recent Comps Whenever Possible
It’s best to look at current information whenever possible. This is easy for high-volume cards that trade frequently. But it’s not always possible for rare cards that seldom change hands in a public venue. You may not be able to accurately determine comps for rare 1/1 cards or cards that haven’t sold recently (or ever).
The best way to determine market value for the rarest cards is to sell them in a well-publicized auction.
Other rare cards may only change hands every few months or years. In these instances, you may need to review historical data and assign a value based on the card’s rarity, previous sale prices, or extrapolate a value from similar sales.
Be Wary of Outliers & Shill Bidding
There are always outliers. It’s often possible to find cards that sold well above or below the average sale price of comparable examples. As a buyer, you generally want to zero in on the lowest recent sales price, while the seller wants to comp the card against the highest recent sales price.
Sometimes you need to exclude the high and low sales prices and focus on the average sales price. Try to find patterns whenever possible.
You also want to verify that the sale was actually completed. Some unscrupulous sellers participate in shill bidding to artificially inflate the sales price of certain cards. Shill bidding is akin to a pump-and-dump scheme in the stock market, and it’s more common with modern cards than with vintage cards.
With shill bidding, sellers work with fictitious buyers to bid a card’s value above its normal market value. The auction closes, which creates a new high comp for the card. However, they never intend to complete the sale, and the sale is canceled. The seller then relists the card, allowing it to point to the recent “sale” as a comp. Some sellers do this multiple times before dumping the card on an unsuspecting buyer.
Look for telltale signs, such as the seller auctioning off the same card multiple times in succession. You can spot this by looking at recent sales of the card. Look for auctions using the same photos, cards with the same serial number, or cards with distinctive features, such as the same background element (the arrangement of foil is a common telltale sign in modern cards).
When to Ignore Comps
All of this information is good to have. But sometimes, you have to make your decision based on factors other than pure numbers. Sometimes, you just really want or need that card to fill out your collection, and you’re willing to pay over market price to get it.
And as a seller, you may be motivated to sell a card for more or less than recent comps to achieve your goals. For example, you may just need to move inventory to clear space or free up some budget for new acquisitions. Other times, you may recognize cards that are undervalued and are poised to increase in value. Or you may have a very rare card that you feel deserves a higher price.
Whatever your motivations, understand that comps serve only as a general market guideline. The value of your card is whatever someone is willing to pay for it today – not how much it sold for last month, or how much it might sell for next month.
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