Is John Mayberry #550 worth grading?
Baseball · Baseball Cards 1978 Topps · full price guide →
Strong grading candidate — 230× premium in PSA 10
A PSA 10 John Mayberry #550 sells for $283 against $1.23 raw: a $282 spread, 230× the ungraded price. A PSA 9 ($24.35) 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)
- $1.23
- PSA 10
- $283
- PSA 9
- $24.35
- Gem premium
- 230×
- 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 | $283 | +$257 | +$232 | +$132 |
| PSA 9 | $24.35 | −$1.88 | −$26.88 | −$127 |
| PSA 8 | $8.90 | −$17.33 | −$42.33 | −$142 |
Net = sale price − $1.23 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% | $89.01 | +$37.78 |
| 50% | $154 | +$102 |
| 75% | $218 | +$167 |
Break-even gem rate at the standard fee: about 10%. 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 | $368 | best | 55/45 | 70/30 |
| PSA 10 | $283 | −$85.00 | 55/45 | 75/25 |
| CGC 10 | $170 | −$198 | 55/45 | 75/25 |
| SGC 10 | $170 | −$198 | 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 John Mayberry #550 — FAQ
Is John Mayberry #550 worth grading?
A PSA 10 John Mayberry #550 sells for $283 against $1.23 raw: a $282 spread, 230× the ungraded price. A PSA 9 ($24.35) 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 John Mayberry #550 worth compared with raw?
A PSA 10 John Mayberry #550 (Baseball Cards 1978 Topps) sells for about $283 versus $1.23 for a raw near-mint copy — a 230× premium as of Sep 3, 2026.
Which grading company is best for John Mayberry #550?
By resale value, BGS 10 leads at $368, ahead of PSA 10 at $283. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does John Mayberry #550 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 John Mayberry #550 break even?
At a standard ~$50 fee, submitting John Mayberry #550 breaks even when it gems about 10% of the time (a miss assumed to sell at the PSA 9 price of $24.35).
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