America has always told its story through its games, and for a century that story has been kept on small rectangles of cardboard. The Heirloom Index is built on a simple belief: that the cards collectors have chased for generations are more than commodities — they are the heirlooms of that story. A rookie printed the year a kid from nowhere became a legend. A card that survived a war, a move, a shoebox in an attic. We gather the greatest of them in one place and tell you why each one matters — not as tickers to trade, but as heirlooms to keep and pass down. The market data is here, and it is honest. But the history is the point.
Everything here is curated by hand and grounded in a simple line: $5,000-and-up, blue-chip, professionally graded. We track the market honestly — descriptive signals drawn from live listings, never predictions, never advice. The stories are written by hand, and made to last.
The Heirloom Index is written by Gregory S. Ostrowski, a Certified Financial Planner™ professional who has collected since he was a kid, and for a long time now the kind of cards on this site.
That combination is the reason this exists. When a serious collection changes hands, the questions a family has are half hobby and half financial — what is this, what is it worth, who do we trust, what happens now — and they are almost never asked of the same person. Usually they get asked of whoever shows up first.
Two things, and the second is the reason for the first. In the open, and free: the Heirloom 25, the three indices, the market data and the writing. Privately, for one family at a time: a Portrait is a single card documented in full and made to be framed; a Record is an entire collection, written down so the people who inherit it are not left guessing.
Doing the research in public is how you can judge it before commissioning any of it — against auction results anyone can look up, on the most famous cards in the hobby, where being wrong would be obvious. See what we document →
Neither is an appraisal. We are not appraisers and we do not issue appraisals. If you need one for a tax filing or a legal matter, you need a qualified appraiser, and we will happily say so.
We also publish a free guide for anyone who has inherited a collection, or expects to — what to do first, what never to do, and the difference between the four prices people will quote you. Nothing to sign up for.
The Heirloom 25 is an equal-weighted index of twenty-five cards. Each card is tracked at one fixed PSA grade, chosen once for liquidity and checked against public auction results. That grade never changes from day to day. Each day we take the middle of the qualifying asking prices in that card’s pinned grade — the highest and lowest set aside — divide it by the same card’s price on the index’s opening day, and average those twenty-five ratios. A card that has not listed that day carries its last recorded price forward. The index opened at 1,000.
The index was rebased once, in August 2026. Until then it read the lowest qualifying asking price rather than the middle of the range. A single listing can define a lowest price, so the number followed whichever seller was most motivated rather than the market — and the lowest ask is also where mislabeled and mis-graded listings sit. Changing that changed what the number measures, not merely what it counts, so the series was restarted at 1,000 rather than spliced onto the old one. A chart drawn across that join would have implied a continuity that did not exist. It will not be rebased again.
A grade has to earn the right to set a price. It qualifies on either two or more live listings or three or more verified public-auction sales in the past two years. The second route was added in July 2026, because a sale is better evidence than an ask and several cards on this list trade regularly at auction while almost never appearing for sale online. Cal Ripken’s pinned grade had eighteen documented sales and one live listing; under the old rule it could not be priced at all. The price we publish is still the asking price — the sale record decides whether a grade may speak, not what it says.
Equal weighting means every card counts the same. A ten-percent move in a Kareem rookie moves the index exactly as much as a ten-percent move in a 1952 Mantle, even though one costs fifty times the other. We publish a price-weighted companion figure — what the basket itself costs — with any single card capped at ten percent of it.
Four things you should know, because they are the honest limits of this data. These are asking prices, not sale prices. They tell you what sellers want, which runs above what buyers pay. We price PSA only, so the number is not muddied by cross-grader differences. The $5,000 line is an editorial standard, not a filter — it describes the cards we cover, whose finest examples command five figures and up. A card’s most liquid grade sometimes trades below it, and we track the liquid grade because that is the one the market actually moves. And a grade must clear three checks before it may price the index: enough depth to count as a market — two live listings, or the sale record described above — a price beneath a per-card ceiling, and a price at or above the grade below it. A grade that asks less than the grade beneath it is a data error, and we refuse it.
Nothing here is a prediction, a valuation, or advice. It is a description of what is being asked, today, for a small set of remarkable objects.
When you follow a link from a card to eBay and go on to buy, the Heirloom Index may earn a small commission as an eBay Partner — at no cost to you, and without ever changing the price you pay. That’s what keeps the lights on and the work free. We link to live listings because they’re genuinely useful, never because one pays better than another. If something here helped, that’s the best way to support it.
The commissioned work — the Portraits and the Records — is what the affiliate income does not have to cover. Keeping the two apart is deliberate. We are paid a small commission if you buy through an eBay link, and it is disclosed wherever one appears; nobody pays us to tell you a card is good. Our stake is in whether the work is worth your attention, never in what you decide to do about it.
Questions, corrections, or a card you think belongs here? Write to support@theheirloomindex.com, or follow along on Instagram at @TheHeirloomIndex.
The Heirloom Index is an independent historical and educational reference and fan site. It is not affiliated with, sponsored by, endorsed by, or licensed by Major League Baseball (MLB) or the MLBPA, the National Basketball Association (NBA) or the NBPA, the National Football League (NFL) or the NFLPA, or by Fanatics, Topps, Panini, Upper Deck, Bowman, Fleer, or any other league, players’ association, or card maker. All product names, logos, brands, card designs, and player likenesses featured or referred to here are the property of their respective trademark and copyright holders, who do not sponsor or endorse this site.
Images. Card images on The Heirloom Index are presented for identification, historical commentary, and education. Many are our own photographs of cards; some are used with the permission of the auction house that offered the card — for example, Heritage Auctions / HA.com — and are credited on the card’s page with a link back to the lot; others are drawn from publicly available sources and shown in that same editorial context. The card designs, names, logos, team marks, and player likenesses depicted remain the property of their respective owners; their appearance here is nominative and does not imply any affiliation with, sponsorship by, or endorsement from those owners. We claim no ownership of, and assert no rights in, the underlying intellectual property. If you are a rights holder and would like an image credited or removed, write to support@theheirloomindex.com and we will act promptly.
Not advice. The Heirloom Index is an information and curation tool — not a financial adviser, broker, or dealer. Nothing here is investment advice, and no signal is a recommendation to buy or sell; signals describe observed listing data and may be incomplete or delayed. This site contains affiliate links and may earn from qualifying eBay purchases at no additional cost to you. All written content is original. See our Privacy Policy for how we handle data; full terms will be posted here.