Is Mike Piazza [Members Only] #31 worth grading?
Baseball · Baseball Cards 1997 Stadium Club · full price guide →
Worth grading only if it gems
A PSA 10 Mike Piazza [Members Only] #31 brings $34.59 versus $2.49 raw — a $32.10 spread that covers an economy-tier ~$25 grading fee. Without PSA 9 sales on record, budget for the fee being lost on a near-miss.
- Raw (NM)
- $2.49
- PSA 10
- $34.59
- Gem premium
- 14×
- 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 | $34.59 | +$7.10 | −$17.90 | −$118 |
Net = sale price − $2.49 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.
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 | $45.00 | best | 55/45 | 70/30 |
| PSA 10 | $34.59 | −$10.41 | 55/45 | 75/25 |
| CGC 10 | $21.00 | −$24.00 | 55/45 | 75/25 |
| SGC 10 | $21.00 | −$24.00 | 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 |
|---|---|---|---|---|
| 10 | $34.59 | $21.00 | $45.00 | $21.00 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1997 Stadium Club cards worth checking
Full set checklist →
![Rickey Henderson [Members Only] #66 1997 Stadium Club card](https://i.ebayimg.com/images/g/rz4AAeSwHflqYk~9/s-l500.jpg)
![Mike Piazza [Matrix] #31 1997 Stadium Club card](https://i.ebayimg.com/images/g/Cj8AAeSwlhpqLIrV/s-l500.jpg)
![Chipper Jones [Matrix] #1 1997 Stadium Club card](https://i.ebayimg.com/images/g/BJYAAeSwKwBqT35V/s-l500.jpg)
![Ken Griffey Jr. [Matrix] #50 1997 Stadium Club card](https://i.ebayimg.com/images/g/SkkAAeSwYaxqWXM9/s-l500.jpg)
![Ken Griffey Jr. [Members Only] #50 1997 Stadium Club card](https://i.ebayimg.com/images/g/sBUAAOSwMZplGgup/s-l500.jpg)
Grading Mike Piazza [Members Only] #31 — FAQ
Is Mike Piazza [Members Only] #31 worth grading?
A PSA 10 Mike Piazza [Members Only] #31 brings $34.59 versus $2.49 raw — a $32.10 spread that covers an economy-tier ~$25 grading fee. Without PSA 9 sales on record, budget for the fee being lost on a near-miss.
How much is a PSA 10 Mike Piazza [Members Only] #31 worth compared with raw?
A PSA 10 Mike Piazza [Members Only] #31 (Baseball Cards 1997 Stadium Club) sells for about $34.59 versus $2.49 for a raw near-mint copy — a 14× premium as of Jul 11, 2026.
Which grading company is best for Mike Piazza [Members Only] #31?
By resale value, BGS 10 leads at $45.00, ahead of PSA 10 at $34.59. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Mike Piazza [Members Only] #31 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 baseball 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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