Is Michael Porter Jr. [Ball at Waist Autograph Premium] #137 worth grading?
Basketball · Basketball Cards 2018 Panini Contenders · full price guide →
Worth grading only if it gems
A PSA 10 Michael Porter Jr. [Ball at Waist Autograph Premium] #137 brings $108 versus $41.66 raw — a $65.86 spread that covers an economy-tier ~$25 grading fee. A PSA 9 ($52.56) only about breaks even after fees, so the case rests on gemming.
- Raw (NM)
- $41.66
- PSA 10
- $108
- PSA 9
- $52.56
- Gem premium
- 2.6×
- 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 — PSA 10 | $108 | +$40.86 | +$15.86 | −$84.14 |
| PSA 9 | $52.56 | −$14.10 | −$39.10 | −$139 |
Net = sale price − $41.66 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% | $66.30 | −$25.36 |
| 50% | $80.04 | −$11.62 |
| 75% | $93.78 | +$2.12 |
Break-even gem rate at the standard fee: about 71%. Centering is the usual reason a clean copy misses — measure it before you decide.
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 | $140 | best | 55/45 | 70/30 |
| PSA 10 | $108 | −$32.48 | 55/45 | 75/25 |
| CGC 10 | $65.00 | −$75.00 | 55/45 | 75/25 |
| SGC 10 | $65.00 | −$75.00 | 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.
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Grading Michael Porter Jr. [Ball at Waist Autograph Premium] #137 — FAQ
Is Michael Porter Jr. [Ball at Waist Autograph Premium] #137 worth grading?
A PSA 10 Michael Porter Jr. [Ball at Waist Autograph Premium] #137 brings $108 versus $41.66 raw — a $65.86 spread that covers an economy-tier ~$25 grading fee. A PSA 9 ($52.56) only about breaks even after fees, so the case rests on gemming.
How much is a PSA 10 Michael Porter Jr. [Ball at Waist Autograph Premium] #137 worth compared with raw?
A PSA 10 Michael Porter Jr. [Ball at Waist Autograph Premium] #137 (Basketball Cards 2018 Panini Contenders) sells for about $108 versus $41.66 for a raw near-mint copy — a 2.6× premium as of Sep 3, 2026.
Which grading company is best for Michael Porter Jr. [Ball at Waist Autograph Premium] #137?
By resale value, BGS 10 leads at $140, ahead of PSA 10 at $108. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Michael Porter Jr. [Ball at Waist Autograph Premium] #137 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.
What gem rate makes grading Michael Porter Jr. [Ball at Waist Autograph Premium] #137 break even?
At a standard ~$50 fee, submitting Michael Porter Jr. [Ball at Waist Autograph Premium] #137 breaks even when it gems about 71% of the time (a miss assumed to sell at the PSA 9 price of $52.56).
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