Midpoint - Card Centering Tool

Is Don Mattingly #29 worth grading?

Baseball · Baseball Cards 1991 Post Cereal · full price guide →

Worth grading — even a PSA 9 beats raw

A PSA 10 Don Mattingly #29 sells for $85.00 against $1.12 raw: a $83.88 spread, 76× the ungraded price. Even a PSA 9 ($35.78) 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)
$1.12
PSA 10
$85.00
PSA 9
$35.78
Gem premium
76×
As of
Aug 16, 2026

Break-even by outcome and fee

Don Mattingly #29: net result of grading versus selling raw, by outcome and fee tier
If it comes back…Sells forEconomy / bulk (~$25.00)Standard (~$50.00)Express (~$150)
Gem — PSA 10$85.00+$58.88+$33.88−$66.12
PSA 9$35.78+$9.66−$15.34−$115
PSA 8$5.05−$21.07−$46.07−$146

Net = sale price − $1.12 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?

Don Mattingly #29: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$48.09−$3.03
50%$60.39+$9.27
75%$72.69+$21.57

Break-even gem rate at the standard fee: about 31%. 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
Don Mattingly #29: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
BGS 10$111best55/4570/30
PSA 10$85.00−$26.0055/4575/25
CGC 10$51.00−$60.0055/4575/25
SGC 10$51.00−$60.0055/4575/25

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.

Don Mattingly #29 graded prices by company and grade
GradePSACGCBGSSGCGraded
10$85.00$51.00$111$51.00
9.5$36.91
9$35.78
8$5.05

Run your own numbers

Should I pay this?

Enter the seller’s asking price to see your net outcome per grade.

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Grading Don Mattingly #29 — FAQ

Is Don Mattingly #29 worth grading?

A PSA 10 Don Mattingly #29 sells for $85.00 against $1.12 raw: a $83.88 spread, 76× the ungraded price. Even a PSA 9 ($35.78) 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 Don Mattingly #29 worth compared with raw?

A PSA 10 Don Mattingly #29 (Baseball Cards 1991 Post Cereal) sells for about $85.00 versus $1.12 for a raw near-mint copy — a 76× premium as of Aug 16, 2026.

Which grading company is best for Don Mattingly #29?

By resale value, BGS 10 leads at $111, ahead of PSA 10 at $85.00. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Don Mattingly #29 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 Don Mattingly #29 break even?

At a standard ~$50 fee, submitting Don Mattingly #29 breaks even when it gems about 31% of the time (a miss assumed to sell at the PSA 9 price of $35.78).

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.

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