Is Greg Maddux [Gold] #SD31 worth grading?
Baseball · Baseball Cards 1998 SP Authentic Sheer Dominance · full price guide →
Worth grading — even a PSA 9 beats raw
A Grade 9.5 Greg Maddux [Gold] #SD31 sells for $71.00 against $4.64 raw: a $66.36 spread, 15× the ungraded price. Even a PSA 9 ($64.63) 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)
- $4.64
- Grade 9.5
- $71.00
- PSA 9
- $64.63
- Gem premium
- 15×
- 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 — Grade 9.5 | $71.00 | +$41.36 | +$16.36 | −$83.64 |
| PSA 9 | $64.63 | +$34.99 | +$9.99 | −$90.01 |
Net = sale price − $4.64 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% | $66.22 | +$11.58 |
| 50% | $67.81 | +$13.17 |
| 75% | $69.41 | +$14.77 |
Even a miss (a 9) beats selling raw after the standard fee — the gem rate only decides how much you win by.
Full grade ladder
Raw conditions & history →Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1998 SP Authentic Sheer Dominance cards worth checking
Full set checklist →
![Ken Griffey Jr. [Gold] #SD1 1998 SP Authentic Sheer Dominance card](https://i.ebayimg.com/images/g/UeYAAeSwp~hqWVjM/s-l500.jpg)
![Pedro Martinez [Titanium] #SD24 1998 SP Authentic Sheer Dominance card](https://i.ebayimg.com/images/g/RdgAAOSwJtFmhFJE/s-l500.jpg)
Grading Greg Maddux [Gold] #SD31 — FAQ
Is Greg Maddux [Gold] #SD31 worth grading?
A Grade 9.5 Greg Maddux [Gold] #SD31 sells for $71.00 against $4.64 raw: a $66.36 spread, 15× the ungraded price. Even a PSA 9 ($64.63) 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.
Best on iPhone & Android
Check your baseball card in the Midpoint app
Scan with your camera to measure centering to the millimeter, get an AI grade with corner and edge close-ups, see what your copy is worth, and track it in your portfolio. Free to start.
