1984 Donruss John Castino Diamond Kings Steel #4
1984
See all John Castino cards & values$1.15est. value (ungraded)
Prices updated 2026-10-22
Based on recorded sold prices how we price cards
Price by month
Average price of the 1984 Donruss John Castino Diamond Kings Steel #4 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 | $1.15 | — |
John Castino prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $1.15 | Buy on eBay ↗ |
| PSA 8 | $10.01 | Buy on eBay ↗ |
| PSA 9 | $19.90 | Buy on eBay ↗ |
| Grade 9.5 | $29.00 | Buy on eBay ↗ |
| PSA 10 | $29.66 | Buy on eBay ↗ |
| BGS 10 | $39.00 | Buy on eBay ↗ |
| CGC 10 | $18.00 | Buy on eBay ↗ |
| SGC 10 | $18.00 | Buy on eBay ↗ |
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Affiliate — we may earn a commission1984 Donruss John Castino Diamond Kings Steel #4 value & prices
The 1984 Donruss John Castino Diamond Kings Steel #4 is a Baseball card (Diamond Kings Steel parallel) released in 1984. Ungraded copies carry a market value of about $1.15.
An ungraded copy is worth around $1.15, a PSA 9 around $19.90, a PSA 10 (Gem Mint) around $29.66 and a pristine BGS 10 around $39.00. That's roughly a 26× 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 ($1.15) and top-graded ($29.66) 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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