Midpoint - Card Centering Tool

Is Greg Walker #518 worth grading?

Baseball · Baseball Cards 1984 Topps · full price guide →

Strong grading candidate — 1424× premium in PSA 10

A PSA 10 Greg Walker #518 sells for $598 against $0.42 raw: a $598 spread, 1424× the ungraded price. A PSA 9 ($4.43) 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)
$0.42
PSA 10
$598
PSA 9
$4.43
Gem premium
1424×
As of
Jul 11, 2026

Break-even by outcome and fee

Greg Walker #518: 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$598+$573+$548+$448
PSA 9$4.43−$20.99−$45.99−$146
PSA 8$3.95−$21.47−$46.47−$146

Net = sale price − $0.42 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?

Greg Walker #518: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$153+$102
50%$301+$251
75%$450+$399

Break-even gem rate at the standard fee: about 8%. 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
Greg Walker #518: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
BGS 10$777best55/4570/30
PSA 10$598−$17955/4575/25
CGC 10$359−$41855/4575/25
SGC 10$359−$41855/4575/25

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.

Greg Walker #518 graded prices by company and grade
GradePSACGCBGSSGCGraded
10$598$359$777$359
9.5$29.41
9$4.43
8$3.95

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 Greg Walker #518 — FAQ

Is Greg Walker #518 worth grading?

A PSA 10 Greg Walker #518 sells for $598 against $0.42 raw: a $598 spread, 1424× the ungraded price. A PSA 9 ($4.43) 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 Greg Walker #518 worth compared with raw?

A PSA 10 Greg Walker #518 (Baseball Cards 1984 Topps) sells for about $598 versus $0.42 for a raw near-mint copy — a 1424× premium as of Jul 11, 2026.

Which grading company is best for Greg Walker #518?

By resale value, BGS 10 leads at $777, ahead of PSA 10 at $598. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Greg Walker #518 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 Greg Walker #518 break even?

At a standard ~$50 fee, submitting Greg Walker #518 breaks even when it gems about 8% of the time (a miss assumed to sell at the PSA 9 price of $4.43).

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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