Is Kon Knueppel [Refractor Purple] #SF-24 worth grading?
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Worth grading — even a PSA 9 beats raw
A PSA 10 Kon Knueppel [Refractor Purple] #SF-24 sells for $394 against $86.50 raw: a $308 spread, 4.6× the ungraded price. Even a PSA 9 ($141) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $86.50
- PSA 10
- $394
- PSA 9
- $141
- Gem premium
- 4.6×
- As of
- Sep 4, 2026
Break-even by outcome and fee
| If it comes back… | Sells for | Economy / bulk (~$25.00) | Standard (~$50.00) | Express (~$150) |
|---|---|---|---|---|
| Gem — PSA 10 | $394 | +$283 | +$258 | +$158 |
| PSA 9 | $141 | +$29.48 | +$4.48 | −$95.52 |
| PSA 8 | $81.38 | −$30.12 | −$55.12 | −$155 |
Net = sale price − $86.50 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.
Expected value — how often does it need to gem?
| Chance it gems | Expected sale | Expected net (standard fee) |
|---|---|---|
| 25% | $204 | +$67.83 |
| 50% | $268 | +$131 |
| 75% | $331 | +$195 |
Even a miss (a 9) beats selling raw after the standard fee — the gem rate only decides how much you win by.
Which grader pays the most — and what a 10 takes
All centering standards →| Grader | 10 sells for | vs best | Front centering for a 10 | Back |
|---|---|---|---|---|
| BGS 10 | $513 | best | 55/45 | 70/30 |
| PSA 10 | $394 | −$119 | 55/45 | 75/25 |
| CGC 10 | $237 | −$276 | 55/45 | 75/25 |
| SGC 10 | $237 | −$276 | 55/45 | 75/25 |
Tolerances are each company's published centering standard for its top grade; surface, corners and edges must also be clean. Centering is the one you can measure yourself before you pay.
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Full set checklist →Grading Kon Knueppel [Refractor Purple] #SF-24 — FAQ
Is Kon Knueppel [Refractor Purple] #SF-24 worth grading?
A PSA 10 Kon Knueppel [Refractor Purple] #SF-24 sells for $394 against $86.50 raw: a $308 spread, 4.6× the ungraded price. Even a PSA 9 ($141) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Kon Knueppel [Refractor Purple] #SF-24 worth compared with raw?
A PSA 10 Kon Knueppel [Refractor Purple] #SF-24 (Basketball Cards 2025 Topps Chrome Sleek Finishers) sells for about $394 versus $86.50 for a raw near-mint copy — a 4.6× premium as of Sep 4, 2026.
Which grading company is best for Kon Knueppel [Refractor Purple] #SF-24?
By resale value, BGS 10 leads at $513, ahead of PSA 10 at $394. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Kon Knueppel [Refractor Purple] #SF-24 need for a BGS 10?
BGS publishes 55/45 front and 70/30 back centering as the tolerance for a 10 (Gem Mint). Off-center copies are capped below the top grade regardless of surface — measure yours before paying the fee.
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