1999 Upper Deck Textbook Excellence Mark McGwire Double #T21
1999
See all Mark McGwire cards & values1999 seasonSt. Louis CardinalsMark McGwire career & card values
Uncommon
$6.00est. value (ungraded)
Prices updated 2026-10-22
Based on recorded sold prices how we price cards
Card number
#T21
Year
1999
Parallel / variant
Double
Price by month
Average price of the 1999 Upper Deck Textbook Excellence Mark McGwire Double #T21 each month, from 1 recorded price reading. Prices are re-checked regularly; a month's average counts each day from that month's first reading at the price that held that day.
Recorded high
$6.00
Recorded low
$6.00
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $6.00 | — |
Mark McGwire prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $6.00 | Buy on eBay ↗ |
| PSA 10 | $57.00 | Buy on eBay ↗ |
| BGS 10 | $74.00 | Buy on eBay ↗ |
| CGC 10 | $34.00 | Buy on eBay ↗ |
| SGC 10 | $34.00 | Buy on eBay ↗ |
Other versions of this Mark McGwire card
3 versions, each priced on its own. Most valuable first.
Live on eBay
Affiliate — we may earn a commission1999 Upper Deck Textbook Excellence Mark McGwire Double #T21 value & prices
The 1999 Upper Deck Textbook Excellence Mark McGwire Double #T21 is a Baseball card (Double parallel) released in 1999. Ungraded copies carry a market value of about $6.00.
An ungraded copy is worth around $6.00, a PSA 10 (Gem Mint) around $57.00 and a pristine BGS 10 around $74.00. That's roughly a 9.5× premium for a gem-mint copy over raw — one of the clearest signals that condition-sensitive buyers dominate this card's market.
Is it worth grading?
With raw copies near $6.00 and top grades reaching $57.00, grading a sharp copy of this card can clearly pay for itself — the spread comfortably covers a typical ~$25.00 grading fee. The catch: only submit copies with strong centering, clean corners, and unmarked surfaces, because anything below a 9 usually erases the math.
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Mark McGwire1999 Upper Deck Textbook Excellence1999Baseball cardsDoublePSA 10BGS 10card valueprice guide