Is Kenyon Martin Sr. [Green Hoops] #89S-KM worth grading?
Basketball · Basketball Cards 2025 Topps NBA Hoops 1989 Signature · full price guide →
Strong grading candidate — 7.6× premium in PSA 10
A PSA 10 Kenyon Martin Sr. [Green Hoops] #89S-KM sells for $75.69 against $10.00 raw: a $65.69 spread, 7.6× the ungraded price. A PSA 9 ($25.77) only about breaks even after fees, so the case rests on gemming. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $10.00
- PSA 10
- $75.69
- PSA 9
- $25.77
- Gem premium
- 7.6×
- 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 — PSA 10 | $75.69 | +$40.69 | +$15.69 | −$84.31 |
| PSA 9 | $25.77 | −$9.23 | −$34.23 | −$134 |
| PSA 8 | $14.04 | −$20.96 | −$45.96 | −$146 |
Net = sale price − $10.00 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% | $38.25 | −$21.75 |
| 50% | $50.73 | −$9.27 |
| 75% | $63.21 | +$3.21 |
Break-even gem rate at the standard fee: about 69%. 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 | $98.00 | best | 55/45 | 70/30 |
| PSA 10 | $75.69 | −$22.31 | 55/45 | 75/25 |
| CGC 10 | $45.00 | −$53.00 | 55/45 | 75/25 |
| SGC 10 | $45.00 | −$53.00 | 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 Kenyon Martin Sr. [Green Hoops] #89S-KM — FAQ
Is Kenyon Martin Sr. [Green Hoops] #89S-KM worth grading?
A PSA 10 Kenyon Martin Sr. [Green Hoops] #89S-KM sells for $75.69 against $10.00 raw: a $65.69 spread, 7.6× the ungraded price. A PSA 9 ($25.77) only about breaks even after fees, so the case rests on gemming. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Kenyon Martin Sr. [Green Hoops] #89S-KM worth compared with raw?
A PSA 10 Kenyon Martin Sr. [Green Hoops] #89S-KM (Basketball Cards 2025 Topps NBA Hoops 1989 Signature) sells for about $75.69 versus $10.00 for a raw near-mint copy — a 7.6× premium as of Sep 4, 2026.
Which grading company is best for Kenyon Martin Sr. [Green Hoops] #89S-KM?
By resale value, BGS 10 leads at $98.00, ahead of PSA 10 at $75.69. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Kenyon Martin Sr. [Green Hoops] #89S-KM 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 Kenyon Martin Sr. [Green Hoops] #89S-KM break even?
At a standard ~$50 fee, submitting Kenyon Martin Sr. [Green Hoops] #89S-KM breaks even when it gems about 69% of the time (a miss assumed to sell at the PSA 9 price of $25.77).
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