2021 Score Base Set K.J. Costello Signature Artist's Proof #391
2021
See all K.J. Costello cards & valuesUncommon
$14.28est. value (ungraded)
Prices updated 2026-10-24
Based on recorded sold prices how we price cards
Card number
#391
Year
2021
Parallel / variant
Signature Artist's Proof
K.J. Costello price history
$14.28▲ 0.0%
Oct 23 · $14.28 low$14.28 high · Oct 24
Ungraded market value, one reading a day. One-day spikes that reverse the next day are left out.
Price by month
Average price of the 2021 Score Base Set K.J. Costello Signature Artist's Proof #391 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
$14.28
Recorded low
$14.28
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $14.28 | — |
K.J. Costello prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $14.28 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission2021 Score Base Set K.J. Costello Signature Artist's Proof #391 value & prices
The 2021 Score Base Set K.J. Costello Signature Artist's Proof #391 is a Football card (Signature Artist's Proof parallel) released in 2021. Ungraded copies carry a market value of about $14.28.
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