Darren Rovell on the world's rarest collectibles: Warren Buffett autographs, a $50M Mickey Mantle card, and why size determines value

Darren Rovell on the rarest collectibles

Darren Rovell, founder of Collect, makes a living thinking about what makes objects irreplaceable. His current obsession sits at the intersection of scarcity and the business world: Warren Buffett memorabilia.

The Buffett market

Buffett autographs on uncut, uncirculated dollar bills traded at $2–3 for years. They hit $10–15 over the past five years, and one sold last year for $24,000 — on literal dollar bills, face value included. Rovell owns what he describes as the largest Buffett signature in existence, inked on a dollar bill block at roughly a foot and a half long.

The supply side is genuinely constrained. Buffett stopped signing by mail roughly a decade ago and rarely signs in person. Three or four years ago, fake Buffett autographs began surfacing in volume — authenticators PSA and JSA identified what appeared to be an organized forgery ring operating in New York.

Beyond signed currency, Rovell has assembled every Berkshire Hathaway annual meeting pass since 1997. He also holds a 1947 Woodrow Wilson High School yearbook with Buffett listed in the upper right quadrant — captioned "future stock broker," with basketball, golf, and math listed as favorites.

“About ten years ago, I just thought that Warren in particular and Berkshire Hathaway were so under collected. There's a deal in principle on the table for a 1952 Mickey Mantle PSA 10 for $50,000,000. The nano Tyrannosaurus sold for 47,000,000 even though the estimate was 7. Why? Because you could fit it in a normal room. Sometimes the reason why cards are more valuable than jerseys — it's totally a size thing.”

Why size determines value

The $47 million Sotheby's sale of a Nanotyrannosaurus this week illustrates a principle Rovell applies across categories: the estimate was $7 million, and the nano specimen blew past it largely because it fits in a normal room without custom construction. The same logic explains why cards command premiums over jerseys — portability and displayability are underrated drivers of price.

A deal is reportedly in principle on a 1952 Mickey Mantle PSA 10 card for $50 million. Only three PSA 10 copies exist; one of the three owners recently died, and his heirs are now willing to sell.

Other data points in the ultra-premium tier: a Michael Jordan game-worn jersey sold for $14 million, and a ticket to UFC 1 from 1993 sold this week for $82,000.

The shipping and insurance gap

FedEx is now cheaper for shipping than UPS or USPS, but collectors face a hard ceiling of $1,500 in insurance for items declared as collectibles. On a $30,000 item, a collector faces a choice between underdeclaring the contents — creating liability exposure if something goes wrong — or declaring full value and flagging the package for potential in-store theft. Rovell says he has flown to PSA in person, had high-value items graded on-site, and flown back rather than trust the shipping system.

Collect's business model

Rovell's company, Collect, helps sports teams, leagues, and brands build professional collectibles and memorabilia programs. He uses Dude Perfect as a cautionary example: the YouTube channel's record-breaking stunt balls were returned to the ball rack after filming rather than being preserved and authenticated. With tens of millions of subscribers, those items had obvious monetization potential that was simply left on the table.

Signature dynamics

On autograph strategy, Rovell explains that celebrities who write "to [name]" are actively devaluing the signature for the resale market — it limits the buyer pool to people who share that name. Rubbing alcohol on a Sharpie can remove a personalization in seconds, which serious collectors know. For surface materials, a black Sharpie is the default choice, but on paper he prefers even pencil over Sharpie, because Sharpie contains xylene and will yellow within a few years.

Scarcity is often about context rather than fame. Paul Revere's signature is rarer than George Washington's because Revere was a silversmith, not a politician, and signed almost nothing. Abraham Zapruder — the tailor who filmed the Kennedy assassination — became a recluse afterward and died before autograph collecting was widespread, making his signature exceptionally rare.

On tech figures: Rovell has avoided collecting Elon Musk signatures because Musk is unpredictable enough to hold a mass signing event and flood supply overnight. He moved on Bezos the day he stepped down from Amazon, reasoning that a person who goes from private plane to private island becomes permanently inaccessible. Steve Jobs is the clearest success case — 50 original Apple checks found in a desk drawer in the original garage are expected to sell combined for around $3.8 million.