Is Brooks Robinson #21 worth grading?
Baseball · Baseball Cards 1970 Kellogg's · full price guide →
Worth grading — even a PSA 9 beats raw
A PSA 10 Brooks Robinson #21 sells for $1,109 against $20.57 raw: a $1,089 spread, 54× the ungraded price. Even a PSA 9 ($139) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $20.57
- PSA 10
- $1,109
- PSA 9
- $139
- Gem premium
- 54×
- As of
- Jul 11, 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 | $1,109 | +$1,064 | +$1,039 | +$939 |
| PSA 9 | $139 | +$93.01 | +$68.01 | −$31.99 |
| PSA 8 | $69.86 | +$24.29 | −$0.71 | −$101 |
Net = sale price − $20.57 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% | $381 | +$311 |
| 50% | $624 | +$553 |
| 75% | $867 | +$796 |
Even a miss (a 9) beats selling raw after the standard fee — the gem rate only decides how much you win by.
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 | $1,442 | best | 55/45 | 70/30 |
| PSA 10 | $1,109 | −$333 | 55/45 | 75/25 |
| CGC 10 | $666 | −$776 | 55/45 | 75/25 |
| SGC 10 | $666 | −$776 | 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.
Full grade ladder
Raw conditions & history →| Grade | PSA | CGC | BGS | SGC | Graded |
|---|---|---|---|---|---|
| 10 | $1,109 | $666 | $1,442 | $666 | — |
| 9.5 | — | — | — | — | $494 |
| 9 | — | — | — | — | $139 |
| 8 | — | — | — | — | $69.86 |
| 7 | — | — | — | — | $44.50 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1970 Kellogg's cards worth checking
Full set checklist →
Grading Brooks Robinson #21 — FAQ
Is Brooks Robinson #21 worth grading?
A PSA 10 Brooks Robinson #21 sells for $1,109 against $20.57 raw: a $1,089 spread, 54× the ungraded price. Even a PSA 9 ($139) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Brooks Robinson #21 worth compared with raw?
A PSA 10 Brooks Robinson #21 (Baseball Cards 1970 Kellogg's) sells for about $1,109 versus $20.57 for a raw near-mint copy — a 54× premium as of Jul 11, 2026.
Which grading company is best for Brooks Robinson #21?
By resale value, BGS 10 leads at $1,442, ahead of PSA 10 at $1,109. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Brooks Robinson #21 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.
Is your baseball card centered well enough to grade?
Centering makes or breaks a PSA 10. Scan any card with Midpoint to measure its exact centering, get a grade estimate, and see what your copy is actually worth.
Check my card free