Cards › 2025 Topps Chrome Kon Knueppel #254 Basketball Refractor

Is the 2025 Topps Chrome Kon Knueppel #254 Basketball Refractor worth grading?

Live market numbers as of 2026-10-21 — raw vs. graded value, PSA 10 gem rate, and the breakeven math.

Raw value

$41.15

PSA 9 value

$64.99

PSA 10 value

$349.68

PSA 10 gem rate

51.2%

Based on the numbers below, this card is a strong grading candidate at current prices: a PSA 10 nets an estimated $168 profit and 51.2% of recent submissions gemmed.

The breakeven math

Line item	Amount
Raw purchase	$41.15
Sales tax (8%)	$3.29
Grading fee (priority tier)	$80.00
Shipping	$5.00
Total cost basis	$129.44
Net at PSA 10 (85% payout)	+$167.79 (+130%)
Net at PSA 9 (the downside case)	−$74.20

Assumptions: $80 grading, $5 shipping, 8% tax on the raw purchase, and keeping 85% of the sale after marketplace fees. Your numbers will differ — run them below.

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Card pricing data provided by SportsCardsPro, a service of PriceCharting. Gem rates reflect recent PSA population data (572 graded submissions). Not investment advice — grading outcomes are probabilistic and markets move. © Summit Sports Cards · About · Pricing