Cards › 2024 Bowman Chrome University Kon Knueppel #48 Refractor

Is the 2024 Bowman Chrome University Kon Knueppel #48 Refractor worth grading?

Live market numbers as of 2026-06-22 — raw vs. graded value, PSA 10 gem rate, and the breakeven math.

Raw value

$7.19

PSA 9 value

$30.00

PSA 10 value

$104.26

PSA 10 gem rate

72.1%

Based on the numbers below, this card is a strong grading candidate at current prices: a PSA 10 nets an estimated $51 profit and 72.1% of recent submissions gemmed.

The breakeven math

Line item	Amount
Raw purchase	$7.19
Sales tax (8%)	$0.58
Grading fee (value tier)	$25.00
Shipping	$5.00
Total cost basis	$37.77
Net at PSA 10 (85% payout)	+$50.86 (+135%)
Net at PSA 9 (the downside case)	−$12.27

Assumptions: $25 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 (43 graded submissions). Not investment advice — grading outcomes are probabilistic and markets move. © Summit Sports Cards · About · Pricing