Midpoint - Card Centering Tool
Mark McGwire #120 (Baseball Cards 1998 SPx Finite) — is it worth grading?

Is Mark McGwire #120 worth grading?

Baseball · Baseball Cards 1998 SPx Finite · full price guide →

Strong grading candidate — 50× premium in PSA 10

A PSA 10 Mark McGwire #120 sells for $75.21 against $1.50 raw: a $73.71 spread, 50× the ungraded price. A PSA 9 ($17.99) 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)
$1.50
PSA 10
$75.21
PSA 9
$17.99
Gem premium
50×
As of
Jul 11, 2026

Break-even by outcome and fee

Mark McGwire #120: 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$75.21+$48.71+$23.71−$76.29
PSA 9$17.99−$8.51−$33.51−$134
PSA 8$8.98−$17.52−$42.52−$143

Net = sale price − $1.50 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?

Mark McGwire #120: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$32.30−$19.20
50%$46.60−$4.90
75%$60.91+$9.41

Break-even gem rate at the standard fee: about 59%. 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
Mark McGwire #120: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
BGS 10$98.00best55/4570/30
PSA 10$75.21−$22.7955/4575/25
CGC 10$45.00−$53.0055/4575/25
SGC 10$45.00−$53.0055/4575/25

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.

Mark McGwire #120 graded prices by company and grade
GradePSACGCBGSSGCGraded
10$75.21$45.00$98.00$45.00
9.5$32.50
9$17.99
8$8.98

Run your own numbers

Should I pay this?

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

Other 1998 SPx Finite cards worth checking

Full set checklist

Grading Mark McGwire #120 — FAQ

Is Mark McGwire #120 worth grading?

A PSA 10 Mark McGwire #120 sells for $75.21 against $1.50 raw: a $73.71 spread, 50× the ungraded price. A PSA 9 ($17.99) 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 Mark McGwire #120 worth compared with raw?

A PSA 10 Mark McGwire #120 (Baseball Cards 1998 SPx Finite) sells for about $75.21 versus $1.50 for a raw near-mint copy — a 50× premium as of Jul 11, 2026.

Which grading company is best for Mark McGwire #120?

By resale value, BGS 10 leads at $98.00, ahead of PSA 10 at $75.21. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Mark McGwire #120 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 Mark McGwire #120 break even?

At a standard ~$50 fee, submitting Mark McGwire #120 breaks even when it gems about 59% of the time (a miss assumed to sell at the PSA 9 price of $17.99).

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