2020-21 Donruss Optic Signature Series Jack Sikma Purple #SS-JSI
2020
See all Jack Sikma cards & valuesUncommon
$6.06est. value (ungraded)
Prices updated 2026-10-23
Based on recorded sold prices how we price cards
Card number
#SS-JSI
Year
2020
Parallel / variant
Purple
Jack Sikma price history
$39.10▲ 0.0%
Oct 22 · $39.10 low$39.10 high · Oct 23
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 Jack Sikma Purple #SS-JSI 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
$6.06
Recorded low
$6.06
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $6.06 | — |
Jack Sikma prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $6.06 | Buy on eBay ↗ |
| PSA 8 | $10.27 | Buy on eBay ↗ |
| PSA 9 | $15.51 | Buy on eBay ↗ |
| Grade 9.5 | $31.21 | Buy on eBay ↗ |
| PSA 10 | $39.10 | Buy on eBay ↗ |
| BGS 10 | $51.00 | Buy on eBay ↗ |
| CGC 10 | $16.00 | Buy on eBay ↗ |
| SGC 10 | $23.00 | Buy on eBay ↗ |
Other versions of this Jack Sikma card
5 versions, each priced on its own. Most valuable first.
Live on eBay
Affiliate — we may earn a commission2020-21 Donruss Optic Signature Series Jack Sikma Purple #SS-JSI value & prices
The 2020-21 Donruss Optic Signature Series Jack Sikma Purple #SS-JSI is a Basketball card (Purple parallel) released in 2020. Ungraded copies carry a market value of about $6.06.
An ungraded copy is worth around $6.06, a PSA 9 around $15.51, a PSA 10 (Gem Mint) around $39.10 and a pristine BGS 10 around $51.00. That's roughly a 6.5× 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?
The spread between raw ($6.06) and top-graded ($39.10) 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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