Cooper Flagg Black Sapphire Auto /10 Sells for $36,600

The ultra-modern basketball market added a notable data point on March 15, 2026, when Goldin closed a key Cooper Flagg sale: a 2025-26 Topps Chrome Sapphire Edition Topps Chrome Autographs Rookies Black Sapphire #TCAR-CF, serial numbered 02/10, graded PSA MINT 9 with a PSA/DNA GEM MT 10 autograph. The card realized $36,600.

For collectors tracking early Cooper Flagg issues, this card checks several important boxes:

• Early Topps Chrome Sapphire appearance
• On-card rookie autograph
• Low-serial Black Sapphire parallel (/10)
• PSA 9 card grade with a GEM MT 10 auto
• Serial number 02/10 matching his college jersey number

Because 2025-26 products are still ultra-modern and being opened, population reports (often shortened to “pop reports,” meaning the number of copies graded at each grade level) are still evolving. Even so, a Black Sapphire /10 auto from a major chromium brand like Topps Chrome already sits at the very top of Flagg’s early card hierarchy.

Card breakdown

Set and parallel
This card comes from 2025-26 Topps Chrome Sapphire Edition, a premium chromium parallel line that Topps typically releases in shorter print runs than standard Topps Chrome. The specific subset is Topps Chrome Autographs Rookies, and this copy is the Black Sapphire parallel, numbered to just 10.

Within the hobby, low-color parallels like Black /10 are generally viewed as “chase cards” — the tougher, more limited versions that collectors target once they have the base autograph or more common colors in hand. When that scarcity is paired with a key player’s early or rookie autograph, it often becomes one of the go-to reference points for tracking that player’s high-end market.

Rookie and autograph status
This is a Cooper Flagg rookie auto from an early Topps Chrome Sapphire release. For a modern basketball player, a chromium rookie autograph from a recognizable brand tends to function as a “core premium rookie” card, even if future NBA-licensed rookie cards also emerge. The autograph is on-card (signed directly on the card surface), which many collectors prefer over sticker autographs.

Grading details
This copy received:

• PSA MINT 9 for the card grade (surface, corners, edges, centering)
• PSA/DNA GEM MT 10 for the autograph grade

That combination — a high card grade plus a perfect autograph grade — is one of the more desirable outcomes for a modern, low-serial autograph. The label clearly designates both, which matters for collectors who distinguish between card condition and autograph quality.

The jersey-number factor

One additional nuance: this card is serial numbered 02/10, matching Cooper Flagg’s college jersey number. Jersey-number matching (sometimes called an “eBay 1/1” in hobby slang) doesn’t change the actual print run, but it often adds an extra layer of appeal for certain collectors. Among the ten possible copies, the jersey-numbered one is usually treated as a premium version, especially for player-focused collectors or high-end showcases.

Market context and comps

Because this is an ultra-modern release and a /10 parallel, confirmed public sales of the exact same card and grade are limited so far. Instead of looking only for identical matches, it helps to think in concentric circles:

1. Exact card, different copies and grades

   • Other 2025-26 Topps Chrome Sapphire Black Sapphire /10 Cooper Flagg autos that have surfaced tend to be in the same general high-end territory, with exact pricing dependent on grade, centering, and whether the serial number has special appeal (01/10, 02/10, 10/10, etc.).
   • Where data exists, PSA 10 examples and BGS/CGC gem-mint equivalents have asked for a premium over PSA 9s, which fits the normal pattern in ultra-modern chromium cards.

2. Same player, different parallels

   • Color parallels with higher print runs (for example, cards numbered /25, /50, or unnumbered refractors) have been closing at noticeably lower levels than this $36,600 result at Goldin, which is consistent with the idea that the Black Sapphire /10 sits near the top of his Chrome Sapphire auto ladder.
   • Non-Sapphire Cooper Flagg autographs from early releases (standard chrome or paper autos) have generally sold in lower ranges, reinforcing Sapphire’s position as a more premium niche.

3. Similar-tier prospects in recent years

   • For ultra-hyped modern prospects, low-numbered chromium rookie autos (/10 or less) in high grades frequently establish themselves as early “barometer cards” for the player’s market.
   • The $36,600 realized price is in line with other top-prospect, low-serial, on-card rookie autos in PSA 9 with strong auto subgrades, especially when they come from a recognizable chromium brand and a more limited parallel line like Sapphire.

Within that broader context, this Goldin result does not appear to be an outlier in either direction. Instead, it functions as a solid, data-backed reference point for where the market is currently valuing a marquee Cooper Flagg Sapphire auto near the top of his rarity ladder.

Why this card matters for collectors

1. Early, premium representation for a headline prospect
Cooper Flagg’s early cardboard is drawing attention from both newer collectors and long-time hobbyists who focus on potential franchise-level talents. In that environment, a low-serial Topps Chrome Sapphire autograph becomes more than just another parallel; it’s one of the cleaner, more recognizable ways to express a high-conviction belief in the player.

2. Position within the ultra-modern era
Ultra-modern cards (roughly mid-2010s to present) are defined by parallel-heavy checklists, serial numbering, and a strong grading culture. That means collectors often sort a player’s rookies into tiers:

• Flagship or core chromium rookies
• Key autographs
• Short-printed or low-serial parallels

This Black Sapphire /10 checks all three boxes simultaneously, which is why it draws disproportionate attention even though only ten copies exist.

3. Grading and condition sensitivity
Sapphire cards can sometimes be condition-sensitive because of their surface finish and dark color palettes. That makes a PSA MINT 9, paired with a GEM MT 10 autograph, a reassuring signal for collectors who prioritize eye appeal and long-term display value. In modern markets, the card’s numeric grade often directly affects liquidity and price ranges, so each additional PSA 9 or PSA 10 that enters the population will slowly refine comps over time.

Reading the $36,600 sale as a data point

For collectors and small sellers looking at this Goldin auction, there are a few practical takeaways:

• This sale anchors the top-end Sapphire auto market for Flagg. While one sale never tells the entire story, a public auction closing at $36,600 provides a reference for future negotiations on similar Cooper Flagg Sapphire autos.

• Rarity plus presentation still matters. A visually strong, low-serial, on-card autograph in a high grade continues to draw attention, even in a market with many alternatives and parallel choices.

• Context is key when using comps. “Comps” (short for comparable sales) are guides, not guarantees. A PSA 9 /10 auto with a PSA 10 autograph sold in a March 15, 2026 Goldin auction is not directly interchangeable with, for example, a raw copy sold in a fixed-price marketplace two months later, or a higher or lower serial-number parallel.

• Jersey-numbered copies can attract extra interest. The 02/10 serial match to Flagg’s college jersey number adds a subtle but real layer of desirability for many collectors. That nuance is worth noting when you’re comparing future sales of other serial numbers from the same /10 run.

What to watch next

Collectors following Cooper Flagg and this specific Sapphire lane may want to keep an eye on:

• Additional graded copies of this exact Black Sapphire /10 auto as they appear at auction houses or marketplaces. Each new sale will refine the emerging price band.
• Population report updates from PSA and other grading companies to see how many copies land in PSA 9 or PSA 10 over time.
• How other premium parallels (such as 1/1s or lower-numbered colors from different Topps or Chrome releases) perform relative to this $36,600 benchmark.

For now, the 2025-26 Topps Chrome Sapphire Edition Topps Chrome Autographs Rookies Black Sapphire #TCAR-CF Cooper Flagg, PSA MINT 9 with PSA/DNA GEM MT 10 auto, serial numbered 02/10, stands as a clean, well-documented snapshot of how the hobby is currently valuing one of his most limited early Topps Chrome Sapphire autograph cards, as confirmed by the March 15, 2026 Goldin auction.