2020-21 Donruss Optic Signature Series Isaiah Stewart Purple #SS-IST
2020
See all Isaiah Stewart cards & values2020 seasonWashington Huskies men's basketballIsaiah Stewart career & card values
Uncommon
$5.15est. value (ungraded)
Prices updated 2026-11-02
Based on recorded sold prices how we price cards
Card number
#SS-IST
Year
2020
Parallel / variant
Purple
Isaiah Stewart price history
$36.41▼ 0.1%
Oct 22 · $36.41 low$36.45 high · Nov 2
PSA 10 market value, one reading a day. One-day spikes that reverse the next day are left out.
Price by month
Average price of the 2020-21 Donruss Optic Signature Series Isaiah Stewart Purple #SS-IST each month, from 2 recorded price readings. 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
$5.15
Recorded low
$4.85
| Month | Source | Average | Range |
|---|---|---|---|
| Nov 2026 | Market value | $5.15 | — |
| Oct 2026 | Market value | $4.85 | — |
Isaiah Stewart prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $5.15 | Buy on eBay ↗ |
| PSA 8 | $8.72 | Buy on eBay ↗ |
| PSA 9 | $10.00 | Buy on eBay ↗ |
| Grade 9.5 | $27.90 | Buy on eBay ↗ |
| PSA 10 | $36.41 | Buy on eBay ↗ |
| BGS 10 | $47.00 | Buy on eBay ↗ |
| CGC 10 | $15.00 | Buy on eBay ↗ |
| SGC 10 | $22.00 | Buy on eBay ↗ |
Other versions of this Isaiah Stewart card
4 versions, each priced on its own. Most valuable first.
Live on eBay
Affiliate — we may earn a commission2020-21 Donruss Optic Signature Series Isaiah Stewart Purple #SS-IST value & prices
The 2020-21 Donruss Optic Signature Series Isaiah Stewart Purple #SS-IST is a Basketball card (Purple parallel) released in 2020. Ungraded copies carry a market value of about $5.15.
An ungraded copy is worth around $5.15, a PSA 9 around $10.00, a PSA 10 (Gem Mint) around $36.41 and a pristine BGS 10 around $47.00. That's roughly a 7.1× 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 ($5.15) and top-graded ($36.41) 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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Isaiah Stewart2020-21 Donruss Optic Signature Series2020Basketball cardsPurplePSA 10BGS 10card valueprice guide