![Mark McGwire [Double] #T21 Baseball Cards 1999 Upper Deck Textbook Excellence trading card — raw and PSA graded price guide](https://i.ebayimg.com/images/g/lg0AAeSwCxZptipk/s-l1600.jpg)
Mark McGwire [Double] #T21 Price Guide
Baseball · Baseball Cards 1999 Upper Deck Textbook Excellence · Released 1999
Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence) is currently worth $8.99 raw (near mint) and $57.00 in PSA 10 (as of Jul 11, 2026). Values come from the PriceCharting price guide and are refreshed weekly. Grading is the single biggest value lever — check the raw-to-PSA-10 gap below, then scan your copy to see if its centering makes the grade.
Current prices
Raw (ungraded)
| Ungraded | $8.99 |
Graded — grade ladder
| Grade | PSA | CGC | BGS | SGC |
|---|---|---|---|---|
| 10 | $57.00 | $34.00 | $74.00 | $34.00 |
Last updated 2026-07-11 · Source: the PriceCharting price guide
Shop this card on eBay ↗As an eBay Partner, Midpoint may earn commission from qualifying purchases.
Is it worth grading?
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.
Full grading break-even for Mark McGwire [Double] #T21: fee tiers, best grader, gem-rate math →
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
More from 1999 Upper Deck Textbook Excellence
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)
More Mark McGwire cards
All Mark McGwire cards →
Price alert
Watching this card? Set a line and Midpoint emails you the day the market crosses it — waiting to buy the dip or sell the spike.
Mark McGwire [Double] #T21 — frequently asked
How much is Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence) worth?
As of Jul 11, 2026, Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence): an ungraded near-mint copy sells for about $8.99, a PSA 10 sells for about $57.00. Values come from the PriceCharting price guide and are refreshed weekly.
How much is a PSA 10 Mark McGwire [Double] #T21 worth?
As of Jul 11, 2026, a PSA 10 (Gem Mint) Mark McGwire [Double] #T21 (Baseball Cards 1999 Upper Deck Textbook Excellence) sells for about $57.00, compared with $8.99 for a raw near-mint copy.
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.
Where do these Baseball card prices come from?
Prices are the PriceCharting price guide, refreshed weekly. Raw values reflect near-mint (NM) ungraded copies; graded values are per grading company and grade.
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