Is Mark McGwire #399 worth grading?
Baseball · Baseball Cards 1991 Stadium Club · full price guide →
Strong grading candidate — 44× premium in PSA 10
A PSA 10 Mark McGwire #399 sells for $60.51 against $1.36 raw: a $59.15 spread, 44× the ungraded price. A PSA 9 ($13.60) 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)
- $1.36
- PSA 10
- $60.51
- PSA 9
- $13.60
- Gem premium
- 44×
- As of
- Sep 4, 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 | $60.51 | +$34.15 | +$9.15 | −$90.85 |
| PSA 9 | $13.60 | −$12.76 | −$37.76 | −$138 |
| PSA 8 | $5.16 | −$21.20 | −$46.20 | −$146 |
Net = sale price − $1.36 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% | $25.33 | −$26.03 |
| 50% | $37.05 | −$14.30 |
| 75% | $48.78 | −$2.58 |
Break-even gem rate at the standard fee: about 80%. 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 | $79.00 | best | 55/45 | 70/30 |
| PSA 10 | $60.51 | −$18.49 | 55/45 | 75/25 |
| CGC 10 | $36.00 | −$43.00 | 55/45 | 75/25 |
| SGC 10 | $36.00 | −$43.00 | 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 →Swipe the table for the other grading companies →
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1991 Stadium Club cards worth checking
Full set checklist →![Nolan Ryan [Tux] #200 1991 Stadium Club card](https://i.ebayimg.com/images/g/xNAAAeSwT0xqQsX6/s-l500.jpg)
Grading Mark McGwire #399 — FAQ
Is Mark McGwire #399 worth grading?
A PSA 10 Mark McGwire #399 sells for $60.51 against $1.36 raw: a $59.15 spread, 44× the ungraded price. A PSA 9 ($13.60) 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 #399 worth compared with raw?
A PSA 10 Mark McGwire #399 (Baseball Cards 1991 Stadium Club) sells for about $60.51 versus $1.36 for a raw near-mint copy — a 44× premium as of Sep 4, 2026.
Which grading company is best for Mark McGwire #399?
By resale value, BGS 10 leads at $79.00, ahead of PSA 10 at $60.51. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Mark McGwire #399 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 #399 break even?
At a standard ~$50 fee, submitting Mark McGwire #399 breaks even when it gems about 80% of the time (a miss assumed to sell at the PSA 9 price of $13.60).
Best on iPhone & Android
Check your baseball card in the Midpoint app
Scan with your camera to measure centering to the millimeter, get an AI grade with corner and edge close-ups, see what your copy is worth, and track it in your portfolio. Free to start.
