2021 Panini Mosaic Base Set Buster Posey Green Swirl Mosaic #21
2021
See all Buster Posey cards & values2021 seasonSan Francisco GiantsBuster Posey career & card values
$20.50est. value (ungraded)
Prices updated 2026-10-24
Based on recorded sold prices how we price cards
Buster Posey 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 2021 Panini Mosaic Base Set Buster Posey Green Swirl Mosaic #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.
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $20.50 | — |
Buster Posey prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $20.50 | Buy on eBay ↗ |
| PSA 10 | $22.01 | Buy on eBay ↗ |
| BGS 10 | $29.00 | Buy on eBay ↗ |
| CGC 10 | $9.00 | Buy on eBay ↗ |
| SGC 10 | $13.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission2021 Panini Mosaic Base Set Buster Posey Green Swirl Mosaic #21 value & prices
The 2021 Panini Mosaic Base Set Buster Posey Green Swirl Mosaic #21 is a Baseball card (Green Swirl Mosaic parallel) released in 2021. Ungraded copies carry a market value of about $20.50.
An ungraded copy is worth around $20.50, a PSA 10 (Gem Mint) around $22.01 and a pristine BGS 10 around $29.00.
Is it worth grading?
The spread between raw ($20.50) and top-graded ($22.01) 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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