2021 Topps UK Edition Base Set Buster Posey Union Jack #51
2021
See all Buster Posey cards & values2021 seasonSan Francisco GiantsBuster Posey career & card values
Uncommon
$9.06est. value (ungraded)
Prices updated 2026-10-24
Based on recorded sold prices how we price cards
Card number
#51
Year
2021
Parallel / variant
Union Jack
Buster Posey price history
$43.42▲ 0.0%
Oct 23 · $43.42 low$43.42 high · Oct 24
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 Topps UK Edition Base Set Buster Posey Union Jack #51 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
$9.06
Recorded low
$9.06
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $9.06 | — |
Buster Posey prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $9.06 | Buy on eBay ↗ |
| PSA 8 | $11.59 | Buy on eBay ↗ |
| PSA 9 | $19.25 | Buy on eBay ↗ |
| Grade 9.5 | $35.08 | Buy on eBay ↗ |
| PSA 10 | $43.42 | Buy on eBay ↗ |
| BGS 10 | $56.00 | Buy on eBay ↗ |
| CGC 10 | $17.00 | Buy on eBay ↗ |
| SGC 10 | $26.00 | Buy on eBay ↗ |
Other versions of this Buster Posey card
3 versions, each priced on its own. Most valuable first.
Live on eBay
Affiliate — we may earn a commission2021 Topps UK Edition Base Set Buster Posey Union Jack #51 value & prices
The 2021 Topps UK Edition Base Set Buster Posey Union Jack #51 is a Baseball card (Union Jack parallel) released in 2021. Ungraded copies carry a market value of about $9.06.
An ungraded copy is worth around $9.06, a PSA 9 around $19.25, a PSA 10 (Gem Mint) around $43.42 and a pristine BGS 10 around $56.00. That's roughly a 4.8× 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 ($9.06) and top-graded ($43.42) 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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Buster Posey2021 Topps UK Edition Base Set2021Baseball cardsUnion JackPSA 10BGS 10card valueprice guide