Is Mark McGwire #TH20 worth grading?
Baseball · Baseball Cards 1999 Topps Gallery Heritage · full price guide →
Strong grading candidate — 23× premium in PSA 10
A PSA 10 Mark McGwire #TH20 sells for $112 against $4.84 raw: a $107 spread, 23× the ungraded price. A PSA 9 ($23.25) 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)
- $4.84
- PSA 10
- $112
- PSA 9
- $23.25
- Gem premium
- 23×
- 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 | $112 | +$82.04 | +$57.04 | −$42.96 |
| PSA 9 | $23.25 | −$6.59 | −$31.59 | −$132 |
| PSA 8 | $12.48 | −$17.36 | −$42.36 | −$142 |
Net = sale price − $4.84 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% | $45.41 | −$9.43 |
| 50% | $67.56 | +$12.72 |
| 75% | $89.72 | +$34.88 |
Break-even gem rate at the standard fee: about 36%. 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 | $145 | best | 55/45 | 70/30 |
| PSA 10 | $112 | −$33.12 | 55/45 | 75/25 |
| CGC 10 | $67.00 | −$78.00 | 55/45 | 75/25 |
| SGC 10 | $67.00 | −$78.00 | 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 | $112 | $67.00 | $145 | $67.00 | — |
| 9.5 | — | — | — | — | $42.81 |
| 9 | — | — | — | — | $23.25 |
| 8 | — | — | — | — | $12.48 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1999 Topps Gallery Heritage cards worth checking
Full set checklist →![Kerry Wood [Proof] #TH14 1999 Topps Gallery Heritage card](https://i.ebayimg.com/images/g/HjAAAeSwQZZpVYf9/s-l500.jpg)
![Ken Griffey Jr. [Proof] #TH8 1999 Topps Gallery Heritage card](https://i.ebayimg.com/images/g/zLsAAOSw~E5nITpV/s-l500.jpg)
Grading Mark McGwire #TH20 — FAQ
Is Mark McGwire #TH20 worth grading?
A PSA 10 Mark McGwire #TH20 sells for $112 against $4.84 raw: a $107 spread, 23× the ungraded price. A PSA 9 ($23.25) 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 #TH20 worth compared with raw?
A PSA 10 Mark McGwire #TH20 (Baseball Cards 1999 Topps Gallery Heritage) sells for about $112 versus $4.84 for a raw near-mint copy — a 23× premium as of Jul 11, 2026.
Which grading company is best for Mark McGwire #TH20?
By resale value, BGS 10 leads at $145, ahead of PSA 10 at $112. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Mark McGwire #TH20 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 #TH20 break even?
At a standard ~$50 fee, submitting Mark McGwire #TH20 breaks even when it gems about 36% of the time (a miss assumed to sell at the PSA 9 price of $23.25).
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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