Source-based reporting by RippingPatrol Editorial. Prices are venue-reported results; no firsthand card inspection, payment settlement or auction participation is claimed.
WHY IT MATTERS
Record the exact debut-patch issue and both grades. The three reported totals include buyer’s premium and describe separate one-of-one cards.
Event date: . This article’s publication date is shown separately above.
Three results from the same debut-patch series
Fanatics Collect reports that Cooper Flagg’s one-of-one Topps Chrome Update NBA Debut Patch Autograph #DPA-CF sold for US$8,040,000 on September 25, 2026. September Premier lot 1 lists a PSA 10 card grade and a separate 10 autograph assessment. The reported amount includes the buyer’s premium.
Two other one-of-one NBA Debut Patch Autographs sold in the same auction: Dylan Harper’s at US$2,880,000 and Kon Knueppel’s #DPA-KK at US$2,340,000. Both totals include the buyer’s premium. Harper’s card is graded PSA 9, while Knueppel’s is PSA 10; each carries a separate autograph grade of 10.
The patch identifies a particular game
Fanatics identifies the Flagg patch with his October 22, 2025 NBA debut against San Antonio. Its description identifies Harper’s patch with that same Dallas–San Antonio game and Knueppel’s with his October 22 debut against Brooklyn. These material histories are the auction venue’s descriptions, rather than independent authentication by RippingPatrol.
The useful comparison starts with that specific issue: player, debut patch, autograph, one-of-one designation and both grades. Three basketball cards from the same series provide context, but they remain different players and different objects. Their prices cannot isolate the effect of a PSA 9 versus PSA 10 grade.
Record the total and the limits of the comparison
Keep the September 25 sold date beside each premium-inclusive US-dollar total. These figures do not establish hammer prices, seller proceeds or payment settlement. A future purchase also needs its own check of applicable taxes, delivery and other charges.
These are retrospective results from three particular lots. They are not current price guides for ordinary Flagg, Harper or Knueppel rookies, and they do not establish a wider rise in basketball-card demand.
