1999 Upper Deck Textbook Excellence Mark McGwire #T21
1999
See all Mark McGwire cards & values1999 seasonSt. Louis CardinalsMark McGwire career & card values
Common
$1.84est. value (ungraded)
Prices updated 2026-10-22
Based on recorded sold prices how we price cards
Card number
#T21
Year
1999
Price by month
Average price of the 1999 Upper Deck Textbook Excellence Mark McGwire #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
$1.84
Recorded low
$1.84
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $1.84 | — |
Mark McGwire prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $1.84 | Buy on eBay ↗ |
| PSA 8 | $5.50 | Buy on eBay ↗ |
| PSA 9 | $6.69 | Buy on eBay ↗ |
| Grade 9.5 | $9.25 | Buy on eBay ↗ |
| PSA 10 | $32.50 | Buy on eBay ↗ |
| BGS 10 | $42.00 | Buy on eBay ↗ |
| CGC 10 | $20.00 | Buy on eBay ↗ |
| SGC 10 | $20.00 | Buy on eBay ↗ |
Mark McGwire parallels
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 #T21 value & prices
The 1999 Upper Deck Textbook Excellence Mark McGwire #T21 is a Baseball card released in 1999. Ungraded copies carry a market value of about $1.84.
An ungraded copy is worth around $1.84, a PSA 9 around $6.69, a PSA 10 (Gem Mint) around $32.50 and a pristine BGS 10 around $42.00. That's roughly a 18× 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?
The spread between raw ($1.84) and top-graded ($32.50) copies is fairly tight, so grading this card only makes financial sense for truly flawless copies — or for collectors who simply prefer slabbed cards for protection and display.
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