Is Michael Porter Jr. [Ball at Waist Autograph Playoff] #137 worth grading?
Basketball · Basketball Cards 2018 Panini Contenders · full price guide →
Worth grading — even a PSA 9 beats raw
A Grade 9.5 Michael Porter Jr. [Ball at Waist Autograph Playoff] #137 sells for $385 against $57.88 raw: a $327 spread, 6.7× the ungraded price. Even a PSA 9 ($350) 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)
- $57.88
- Grade 9.5
- $385
- PSA 9
- $350
- Gem premium
- 6.7×
- 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 — Grade 9.5 | $385 | +$302 | +$277 | +$177 |
| PSA 9 | $350 | +$267 | +$242 | +$142 |
| PSA 8 | $155 | +$72.12 | +$47.12 | −$52.88 |
Net = sale price − $57.88 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% | $359 | +$251 |
| 50% | $368 | +$260 |
| 75% | $376 | +$268 |
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 →| Grade | Graded |
|---|---|
| 9.5 | $385 |
| 9 | $350 |
| 8 | $155 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 2018 Panini Contenders cards worth checking
Full set checklist →![Shai Gilgeous Alexander [Ball Low Autograph Premium] #106 2018 Panini Contenders card](https://i.ebayimg.com/images/g/o9sAAeSw0gFoPZJk/s-l500.jpg)
![Jaren Jackson Jr. [Looking Up Autograph] #132 2018 Panini Contenders card](https://i.ebayimg.com/images/g/IxYAAeSwdzppBAXj/s-l500.jpg)
Grading Michael Porter Jr. [Ball at Waist Autograph Playoff] #137 — FAQ
Is Michael Porter Jr. [Ball at Waist Autograph Playoff] #137 worth grading?
A Grade 9.5 Michael Porter Jr. [Ball at Waist Autograph Playoff] #137 sells for $385 against $57.88 raw: a $327 spread, 6.7× the ungraded price. Even a PSA 9 ($350) 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.
Is your basketball 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.
Check my card free