Black Red 70th Anniversary Mini Diamond Refractor
$58.77
Not enough history yet
Raw $58.77Checked 2026-10-23
2021 Topps Chrome Platinum Anniversary Base Set Austin Riley Blue Mini Diamond Refractor #373
2021
See all Austin Riley cards & valuesUncommon
$7.47est. value (ungraded)
Prices updated 2026-10-23
Based on recorded sold prices how we price cards
Card number
#373
Year
2021
Parallel / variant
Blue Mini Diamond Refractor
Austin Riley price history
$39.99▲ 0.0%
Oct 22 · $39.99 low$39.99 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 2021 Topps Chrome Platinum Anniversary Base Set Austin Riley Blue Mini Diamond Refractor #373 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
$7.47
Recorded low
$7.47
| Month | Source | Average | Range |
|---|---|---|---|
| Oct 2026 | Market value | $7.47 | — |
Austin Riley prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $7.47 | Buy on eBay ↗ |
| PSA 10 | $39.99 | Buy on eBay ↗ |
| BGS 10 | $52.00 | Buy on eBay ↗ |
| CGC 10 | $16.00 | Buy on eBay ↗ |
| SGC 10 | $24.00 | Buy on eBay ↗ |
Other versions of this Austin Riley card
14 versions, each priced on its own. Most valuable first.
Gold Rose Gold 70th Anniversary Wave Refractor
$12.88
Not enough history yet
Raw $12.88Checked 2026-10-23
Platinum 70th Anniversary Mini Diamond Refractor
$7.00
Not enough history yet
Raw $7.00Checked 2026-10-23
Live on eBay
Affiliate — we may earn a commission2021 Topps Chrome Platinum Anniversary Base Set Austin Riley Blue Mini Diamond Refractor #373 value & prices
The 2021 Topps Chrome Platinum Anniversary Base Set Austin Riley Blue Mini Diamond Refractor #373 is a Baseball card (Blue Mini Diamond Refractor parallel) released in 2021. Ungraded copies carry a market value of about $7.47.
An ungraded copy is worth around $7.47, a PSA 10 (Gem Mint) around $39.99 and a pristine BGS 10 around $52.00. That's roughly a 5.4× 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 ($7.47) and top-graded ($39.99) 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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Austin Riley2021 Topps Chrome Platinum Anniversary Base Set2021Baseball cardsBlue Mini Diamond RefractorPSA 10BGS 10card valueprice guide