1991 Upper Deck Denny's Grand Slam Ruben Sierra #21
1991
See all Ruben Sierra cards & valuesCommon
$1.48est. value (ungraded)
Prices updated 2026-10-22
Based on recorded sold prices how we price cards
Card number
#21
Year
1991
Price by month
Average price of the 1991 Upper Deck Denny's Grand Slam Ruben Sierra #21 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
$1.48
Recorded low
$1.48
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $1.48 | — |
Ruben Sierra prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $1.48 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission1991 Upper Deck Denny's Grand Slam Ruben Sierra #21 value & prices
The 1991 Upper Deck Denny's Grand Slam Ruben Sierra #21 is a Baseball card released in 1991. Ungraded copies carry a market value of about $1.48.
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