The 2023 Panini Mosaic Victor Wembanyama #257 is valued at $6.71 raw, $31.00 in PSA 9, $165 in PSA 10 as of November 3, 2026. Its market value is down 25.4% over the last 30 days, from $9.00 to $6.71. Across the 88 days we have tracked it, it has ranged from $6.19 to $9.00, and it currently sits 25% below that high. With 1,033 recorded sales, it ranks #94 of 500 basketball cards we track by trading volume.
On current values, a PSA 9 ($31.00) is worth $0.71 less than a raw copy plus a $25.00 grading fee, while a PSA 10 ($165, 24.6× raw) is worth $133 more, so the difference comes down to the grade. The cheapest PSA 10 copy we matched on eBay when we last checked on November 3, 2026 was $190, 15% above our PSA 10 market value of $165, so eBay offers no discount on this card right now.
About $6.71 raw, $31.00 in PSA 9, $165 in PSA 10, based on our market values as of November 3, 2026. Its market value is down 25.4% over the last 30 days, from $9.00 to $6.71.
On current values, a PSA 9 ($31.00) is worth $0.71 less than a raw copy plus a $25.00 grading fee, while a PSA 10 ($165, 24.6× raw) is worth $133 more, so the difference comes down to the grade. This ignores gem rate and selling fees, so treat it as a best case.
The cheapest PSA 10 copy we matched on eBay when we last checked on November 3, 2026 was $190, 15% above our PSA 10 market value of $165, so eBay offers no discount on this card right now.