2020 Bowman Chrome Prospects Autograph Christian Koss Purple Refractor #CPA-CK
2020
See all Christian Koss cards & values$12.48est. value (ungraded)
Prices updated 2026-10-23
Based on recorded sold prices how we price cards
Christian Koss price history
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 Bowman Chrome Prospects Autograph Christian Koss Purple Refractor #CPA-CK 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.
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $12.48 | — |
Christian Koss prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $12.48 | Buy on eBay ↗ |
| PSA 9 | $18.22 | Buy on eBay ↗ |
| Grade 9.5 | $20.00 | Buy on eBay ↗ |
| PSA 10 | $35.99 | Buy on eBay ↗ |
| BGS 10 | $47.00 | Buy on eBay ↗ |
| CGC 10 | $14.00 | Buy on eBay ↗ |
| SGC 10 | $22.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission2020 Bowman Chrome Prospects Autograph Christian Koss Purple Refractor #CPA-CK value & prices
The 2020 Bowman Chrome Prospects Autograph Christian Koss Purple Refractor #CPA-CK is a Baseball card (Purple Refractor parallel) released in 2020. Ungraded copies carry a market value of about $12.48.
An ungraded copy is worth around $12.48, a PSA 9 around $18.22, a PSA 10 (Gem Mint) around $35.99 and a pristine BGS 10 around $47.00. The gem-mint premium is modest (about 2.9× raw), so condition matters here but doesn't completely define the price.
Is it worth grading?
The spread between raw ($12.48) and top-graded ($35.99) 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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