Is Coby Mayo #STN-6 worth grading?
Baseball · Baseball Cards 2025 Topps Cosmic Chrome Stars In The Night · full price guide →
Strong grading candidate — 7.2× premium in PSA 10
A PSA 10 Coby Mayo #STN-6 sells for $107 against $15.00 raw: a $92.35 spread, 7.2× the ungraded price. A PSA 9 ($15.00) sells for less than raw, so anything short of a 10 loses money. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $15.00
- PSA 10
- $107
- PSA 9
- $15.00
- Gem premium
- 7.2×
- 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 | $107 | +$67.35 | +$42.35 | −$57.65 |
| PSA 9 | $15.00 | −$25.00 | −$50.00 | −$150 |
| PSA 8 | $8.50 | −$31.50 | −$56.50 | −$157 |
Net = sale price − $15.00 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% | $38.09 | −$26.91 |
| 50% | $61.17 | −$3.83 |
| 75% | $84.26 | +$19.26 |
Break-even gem rate at the standard fee: about 54%. 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 | $107 | −$32.65 | 55/45 | 75/25 |
| CGC 10 | $64.00 | −$76.00 | 55/45 | 75/25 |
| SGC 10 | $64.00 | −$76.00 | 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 Coby Mayo #STN-6 — FAQ
Is Coby Mayo #STN-6 worth grading?
A PSA 10 Coby Mayo #STN-6 sells for $107 against $15.00 raw: a $92.35 spread, 7.2× the ungraded price. A PSA 9 ($15.00) sells for less than raw, so anything short of a 10 loses money. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Coby Mayo #STN-6 worth compared with raw?
A PSA 10 Coby Mayo #STN-6 (Baseball Cards 2025 Topps Cosmic Chrome Stars In The Night) sells for about $107 versus $15.00 for a raw near-mint copy — a 7.2× premium as of Sep 4, 2026.
Which grading company is best for Coby Mayo #STN-6?
By resale value, BGS 10 leads at $140, ahead of PSA 10 at $107. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Coby Mayo #STN-6 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 Coby Mayo #STN-6 break even?
At a standard ~$50 fee, submitting Coby Mayo #STN-6 breaks even when it gems about 54% of the time (a miss assumed to sell at the PSA 9 price of $15.00).
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