Is Marta Kostyuk #CA-MKK worth grading?
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Strong grading candidate — 6.7× premium in PSA 10
A PSA 10 Marta Kostyuk #CA-MKK sells for $79.52 against $11.88 raw: a $67.64 spread, 6.7× the ungraded price. A PSA 9 ($27.35) 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)
- $11.88
- PSA 10
- $79.52
- PSA 9
- $27.35
- Gem premium
- 6.7×
- 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 | $79.52 | +$42.64 | +$17.64 | −$82.36 |
| PSA 9 | $27.35 | −$9.53 | −$34.53 | −$135 |
| PSA 8 | $15.01 | −$21.87 | −$46.87 | −$147 |
Net = sale price − $11.88 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% | $40.39 | −$21.49 |
| 50% | $53.44 | −$8.45 |
| 75% | $66.48 | +$4.60 |
Break-even gem rate at the standard fee: about 66%. 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 | $103 | best | 55/45 | 70/30 |
| PSA 10 | $79.52 | −$23.48 | 55/45 | 75/25 |
| CGC 10 | $48.00 | −$55.00 | 55/45 | 75/25 |
| SGC 10 | $48.00 | −$55.00 | 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 Marta Kostyuk #CA-MKK — FAQ
Is Marta Kostyuk #CA-MKK worth grading?
A PSA 10 Marta Kostyuk #CA-MKK sells for $79.52 against $11.88 raw: a $67.64 spread, 6.7× the ungraded price. A PSA 9 ($27.35) 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 Marta Kostyuk #CA-MKK worth compared with raw?
A PSA 10 Marta Kostyuk #CA-MKK (Tennis Cards 2025 Topps Chrome Sapphire Autograph) sells for about $79.52 versus $11.88 for a raw near-mint copy — a 6.7× premium as of Sep 4, 2026.
Which grading company is best for Marta Kostyuk #CA-MKK?
By resale value, BGS 10 leads at $103, ahead of PSA 10 at $79.52. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Marta Kostyuk #CA-MKK 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 Marta Kostyuk #CA-MKK break even?
At a standard ~$50 fee, submitting Marta Kostyuk #CA-MKK breaks even when it gems about 66% of the time (a miss assumed to sell at the PSA 9 price of $27.35).
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