Is Boom Boom Geoffrion #28 worth grading?
Hockey · Hockey Cards 1958 Parkhurst · full price guide →
Worth grading — even a PSA 9 beats raw
A PSA 10 Boom Boom Geoffrion #28 sells for $5,620 against $28.00 raw: a $5,592 spread, 201× the ungraded price. Even a PSA 9 ($1,843) 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)
- $28.00
- PSA 10
- $5,620
- PSA 9
- $1,843
- Gem premium
- 201×
- As of
- Jul 11, 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 | $5,620 | +$5,567 | +$5,542 | +$5,442 |
| PSA 9 | $1,843 | +$1,790 | +$1,765 | +$1,665 |
| PSA 8 | $389 | +$336 | +$311 | +$211 |
Net = sale price − $28.00 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% | $2,787 | +$2,709 |
| 50% | $3,731 | +$3,653 |
| 75% | $4,675 | +$4,597 |
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 | $7,305 | best | 55/45 | 70/30 |
| PSA 10 | $5,620 | −$1,685 | 55/45 | 75/25 |
| CGC 10 | $3,372 | −$3,933 | 55/45 | 75/25 |
| SGC 10 | $3,372 | −$3,933 | 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.
Full grade ladder
Raw conditions & history →| Grade | PSA | CGC | BGS | SGC | Graded |
|---|---|---|---|---|---|
| 10 | $5,620 | $3,372 | $7,305 | $3,372 | — |
| 9.5 | — | — | — | — | $2,027 |
| 9 | — | — | — | — | $1,843 |
| 8 | — | — | — | — | $389 |
| 7 | — | — | — | — | $192 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
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Grading Boom Boom Geoffrion #28 — FAQ
Is Boom Boom Geoffrion #28 worth grading?
A PSA 10 Boom Boom Geoffrion #28 sells for $5,620 against $28.00 raw: a $5,592 spread, 201× the ungraded price. Even a PSA 9 ($1,843) 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 Boom Boom Geoffrion #28 worth compared with raw?
A PSA 10 Boom Boom Geoffrion #28 (Hockey Cards 1958 Parkhurst) sells for about $5,620 versus $28.00 for a raw near-mint copy — a 201× premium as of Jul 11, 2026.
Which grading company is best for Boom Boom Geoffrion #28?
By resale value, BGS 10 leads at $7,305, ahead of PSA 10 at $5,620. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Boom Boom Geoffrion #28 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.
Is your hockey card centered well enough to grade?
Centering makes or breaks a PSA 10. Scan any card with Midpoint to measure its exact centering, get a grade estimate, and see what your copy is actually worth.
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