![Kon Knueppel [Purple Basketball Refractor] #254 (Basketball Cards 2025 Topps Chrome) — is it worth grading?](https://i.ebayimg.com/images/g/kdQAAeSwquFqo6Xz/s-l1600.jpg)
Is Kon Knueppel [Purple Basketball Refractor] #254 worth grading?
Basketball · Basketball Cards 2025 Topps Chrome · full price guide →
Strong grading candidate — 4.3× premium in PSA 10
A PSA 10 Kon Knueppel [Purple Basketball Refractor] #254 sells for $1,486 against $343 raw: a $1,143 spread, 4.3× the ungraded price. A PSA 9 ($325) sells for less than raw, so anything short of a 10 loses money. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $343
- PSA 10
- $1,486
- PSA 9
- $325
- Gem premium
- 4.3×
- As of
- Sep 3, 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 | $1,486 | +$1,118 | +$1,093 | +$993 |
| PSA 9 | $325 | −$42.55 | −$67.55 | −$168 |
| PSA 8 | $310 | −$57.59 | −$82.59 | −$183 |
Net = sale price − $343 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% | $615 | +$223 |
| 50% | $905 | +$513 |
| 75% | $1,196 | +$803 |
Break-even gem rate at the standard fee: about 6%. Centering is the usual reason a clean copy misses — measure it before you decide.
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 | $1,932 | best | 55/45 | 70/30 |
| PSA 10 | $1,486 | −$446 | 55/45 | 75/25 |
| CGC 10 | $891 | −$1,041 | 55/45 | 75/25 |
| SGC 10 | $891 | −$1,041 | 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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Grading Kon Knueppel [Purple Basketball Refractor] #254 — FAQ
Is Kon Knueppel [Purple Basketball Refractor] #254 worth grading?
A PSA 10 Kon Knueppel [Purple Basketball Refractor] #254 sells for $1,486 against $343 raw: a $1,143 spread, 4.3× the ungraded price. A PSA 9 ($325) sells for less than raw, so anything short of a 10 loses money. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Kon Knueppel [Purple Basketball Refractor] #254 worth compared with raw?
A PSA 10 Kon Knueppel [Purple Basketball Refractor] #254 (Basketball Cards 2025 Topps Chrome) sells for about $1,486 versus $343 for a raw near-mint copy — a 4.3× premium as of Sep 3, 2026.
Which grading company is best for Kon Knueppel [Purple Basketball Refractor] #254?
By resale value, BGS 10 leads at $1,932, ahead of PSA 10 at $1,486. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Kon Knueppel [Purple Basketball Refractor] #254 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.
What gem rate makes grading Kon Knueppel [Purple Basketball Refractor] #254 break even?
At a standard ~$50 fee, submitting Kon Knueppel [Purple Basketball Refractor] #254 breaks even when it gems about 6% of the time (a miss assumed to sell at the PSA 9 price of $325).
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