![Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence) — is it worth grading?](https://i.ebayimg.com/images/g/lg0AAeSwCxZptipk/s-l1600.jpg)
Is Mark McGwire [Double] #T21 worth grading?
Baseball · Baseball Cards 1999 Upper Deck Textbook Excellence · full price guide →
Strong grading candidate — 6.3× premium in PSA 10
A PSA 10 Mark McGwire [Double] #T21 sells for $57.00 against $8.99 raw: a $48.01 spread, 6.3× the ungraded price. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $8.99
- PSA 10
- $57.00
- Gem premium
- 6.3×
- 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 | $57.00 | +$23.01 | −$1.99 | −$102 |
Net = sale price − $8.99 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.
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 | $74.00 | best | 55/45 | 70/30 |
| PSA 10 | $57.00 | −$17.00 | 55/45 | 75/25 |
| CGC 10 | $34.00 | −$40.00 | 55/45 | 75/25 |
| SGC 10 | $34.00 | −$40.00 | 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 |
|---|---|---|---|---|
| 10 | $57.00 | $34.00 | $74.00 | $34.00 |
Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1999 Upper Deck Textbook Excellence cards worth checking
Full set checklist →![Ken Griffey Jr. [Double] #T27 1999 Upper Deck Textbook Excellence card](https://i.ebayimg.com/images/g/RcAAAeSwJAVqSE8M/s-l500.jpg)
![Greg Maddux [Double] #T2 1999 Upper Deck Textbook Excellence card](https://i.ebayimg.com/images/g/2doAAeSwqmpqXro6/s-l500.jpg)
![Barry Bonds [Double] #T25 1999 Upper Deck Textbook Excellence card](https://i.ebayimg.com/images/g/cu0AAeSwwMBqLa7U/s-l500.jpg)
![Chipper Jones [Double] #T3 1999 Upper Deck Textbook Excellence card](https://i.ebayimg.com/images/g/~DYAAeSw77Vplj6E/s-l500.jpg)
![Derek Jeter [Double] #T17 1999 Upper Deck Textbook Excellence card](https://i.ebayimg.com/images/g/YQYAAeSwZZBqEjfK/s-l500.jpg)
Grading Mark McGwire [Double] #T21 — FAQ
Is Mark McGwire [Double] #T21 worth grading?
A PSA 10 Mark McGwire [Double] #T21 sells for $57.00 against $8.99 raw: a $48.01 spread, 6.3× the ungraded price. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Mark McGwire [Double] #T21 worth compared with raw?
A PSA 10 Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence) sells for about $57.00 versus $8.99 for a raw near-mint copy — a 6.3× premium as of Jul 11, 2026.
Which grading company is best for Mark McGwire [Double] #T21?
By resale value, BGS 10 leads at $74.00, ahead of PSA 10 at $57.00. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Mark McGwire [Double] #T21 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.
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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