Creating a Simple Index for Sports Cards

As we've covered previously, our indices cover the entire sports memorabilia collectibles market. This includes cards, rings, trophies, awards and game-used memorabilia.Below we want to explore creating a simple price index for a basket of 20 recommended items. We are creating this index with 20 unique items, as shown below. We made sure each item had more than 250 publicly ...
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The True Life Story of Cracking a Case to Find an Autographed Insert. ODDS?

In the late 80s and early 90s, at the height of the 'junk wax era' manufacturers like Topps, Donruss, Score and Upper Deck mass produced their packs and boxes by the millions. Literally. As the early 90s rolled by, these manufacturers added special inserts -- rare autographed cards, for example -- to entice consumers to purchase in volume. It worked ...
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Michael Jordan Rookie Card Sells for $150,000. WHY? (we’ll tell you)

On Dec. 6th, 2020 (less than one week ago) Robert Edward Auctions sold a 1986 Fleer Michael Jordan Rookie card, graded a Gem Mint 10 by PSA, for $150,000 inclusive of all fees. Exactly 1 year earlier, Dec. 5th, 2019, Heritage Auctions (HA.com) sold a 1986 Fleer Michael Jordan Rookie card, graded a Gem Mint 10 by PSA, for $36,000, ...
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Analysis of Card Grade and Price – Over $1000 vs Under $1000 Cards.

To recap: The box plot below shows the relationship between a collectible's grade and its selling price. As expected, when grade increases, price increases. This is a basket of 15 collectibles, with prices normalized so we can see the relationship between price and grade.As previously discussed, below the grade of 7, the impact of grade on price is not as ...
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Analysis of Card Grade and Price. V2

Continuing with our little test of 1966 Topps Mickey Mantle, from the other post we started showing the relationship between grade and price from a data perspective.Let's take it further.We'd like to find out if the change in price when grade is factored is linear, exponential, etc. Let's take a collection of sales prices and normalize them. We will make ...
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Analysis of Card Grade and the Affect on Price. V1.

If you're new to collecting, it is important to know a few things. 1. Companies like PSACard.com encapsulate and grade collectibles. 2. These grades typically range from 1 (poor) to 10 (gem mint) 3. A perfect 10, or even a mint 9 is very difficult to achieve. Typically, a collectible needs to appear flawless. If you can find a frayed ...
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Tracking the LeBron James Index

LeBron James is one of the greatest stars in NBA history. It's no surprise that collectors and investors flock to his key cards and game-worn memorabilia. One of the most coveted items with fans and collectors is LeBron's 2003 Topps Chrome Rookie Card. The 'Refractor' variant was manufactured in limited quantities - and finding one with a Gem Mint 10 ...
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Predicting Collectible Price Movements – Part II

Today we're exploring another angle on the question: Is it possible to predict price movements in collectibles?Lets look at this from the lens of current events. Do current event impact collectible prices in a significant way? IF SO, is there an example of this we can show with data. We crawled our collectible transaction database and pulled every LeBron James ...
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Interesting: Predicting Future Card Prices

Pertinent information about predictive pricing for PSA graded cards.The sports card and memorabilia market is on fire.The lockdown of 2020 and a $3 Trillion stimulus package led investors to seek safe havens for their cash. The perception of runaway money printing by the Fed has shone a major spotlight on collectibles.Due to their inherent scarcity, collectibles have become the preferred ...
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