Cooper Flagg's Chrome rookie holds while Harper and Knueppel slide

Cooper Flagg put up 43 points, 10 rebounds and six assists in Dallas's 125-122 win over Indiana on Monday to join Kevin Durant as the only teenagers with a 40-10-5 game. His 2025 Topps Chrome rookie PSA 10 didn't move at all and sold for about $295 after the game.

It was his fifth 40-point game. CBS Sports says no other teenager in NBA history has more than three. After Monday he sat 27 points behind Kobe Bryant for the second-most points scored before turning 20, with LeBron James first.

Dylan Harper and Kon Knueppel went second and fourth behind him in the 2025 draft. Both of their rookie PSA 10s from the same Topps Chrome checklist have slid since September while Flagg's hasn't. Next to theirs, a flat price after a record night is the strongest result of the three.

What holds it there is demand. Buyers keep taking Flagg PSA 10s at the same price even though more of them change hands in a week than Harper PSA 10s do in a month. Money didn't run up his ladder after Monday either, because his Refractor and X-Fractor PSA 10s sold right at their November prices. Nobody bailed on his cards and nobody chased them. Every 40-point night gives the next buyer another reason to show up at $295.

The other side is supply. As of Nov. 12, PSA has graded 5,694 of these as 10s and 8,431 as 9s, a 30% gem rate. Sales picked up in November too. If you want to flip his next big night, the base Chrome PSA 10 is the wrong card, because one game won't move a card with that many copies. But that depth is also what makes $295 a price you can trust, because hundreds of sales set it, not three.

I'd pay $295 for Flagg's Chrome PSA 10 before I'd take a markdown on Harper or Knueppel, because his is the one the market keeps buying at full price. Nothing in that price pays for the teenage records he can still add before he turns 20 on Dec. 21.