Is Jerry Koosman #311 worth grading?
Baseball · Baseball Cards 1984 O Pee Chee · full price guide →
Worth grading — even a PSA 9 beats raw
A Grade 9.5 Jerry Koosman #311 sells for $53.00 against $1.25 raw: a $51.75 spread, 42× the ungraded price. Even a PSA 9 ($47.99) 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)
- $1.25
- Grade 9.5
- $53.00
- PSA 9
- $47.99
- Gem premium
- 42×
- 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 — Grade 9.5 | $53.00 | +$26.75 | +$1.75 | −$98.25 |
| PSA 9 | $47.99 | +$21.74 | −$3.26 | −$103 |
Net = sale price − $1.25 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% | $49.24 | −$2.01 |
| 50% | $50.50 | −$0.75 |
| 75% | $51.75 | +$0.50 |
Break-even gem rate at the standard fee: about 65%. Centering is the usual reason a clean copy misses — measure it before you decide.
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Grading Jerry Koosman #311 — FAQ
Is Jerry Koosman #311 worth grading?
A Grade 9.5 Jerry Koosman #311 sells for $53.00 against $1.25 raw: a $51.75 spread, 42× the ungraded price. Even a PSA 9 ($47.99) 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.
What gem rate makes grading Jerry Koosman #311 break even?
At a standard ~$50 fee, submitting Jerry Koosman #311 breaks even when it gems about 65% of the time (a miss assumed to sell at the PSA 9 price of $47.99).
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