Cards › 2025 Topps Chrome Rookie Autograph Kon Knueppel #TCAR-KK Refractor

Is the 2025 Topps Chrome Rookie Autograph Kon Knueppel #TCAR-KK Refractor worth grading?

Live market numbers as of 2026-08-14 — raw vs. graded value, PSA 10 gem rate, and the breakeven math.

Raw value

$735.35

PSA 9 value

$829.00

PSA 10 value

$7,250.00

PSA 10 gem rate

55.6%

Based on the numbers below, this card is a strong grading candidate at current prices: a PSA 10 nets an estimated $5,338 profit and 55.6% of recent submissions gemmed.

The breakeven math

Line item	Amount
Raw purchase	$735.35
Sales tax (8%)	$58.83
Grading fee (value tier)	$25.00
Shipping	$5.00
Total cost basis	$824.18
Net at PSA 10 (85% payout)	+$5,338.32 (+648%)
Net at PSA 9 (the downside case)	−$119.53

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 (9 graded submissions). Not investment advice — grading outcomes are probabilistic and markets move. © Summit Sports Cards · About · Pricing