Roy Halladay #31 Price Guide
Baseball · Baseball Cards 2004 Upper Deck Diamond Collection Pro Sigs · Released 2004
Roy Halladay #31 (Baseball Cards 2004 Upper Deck Diamond Collection Pro Sigs) is currently worth $0.99 raw (near mint) and $29.99 in PSA 10 (as of Sep 4, 2026). Values come from the PriceCharting price guide and are refreshed weekly. Grading is the single biggest value lever — check the raw-to-PSA-10 gap below, then scan your copy to see if its centering makes the grade.
Current prices
Raw (ungraded)
| Ungraded | $0.99 |
Graded — grade ladder
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Last updated 2026-09-04 · Source: the PriceCharting price guide
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Price history
Is it worth grading?
Worth grading only if it gems
A PSA 10 Roy Halladay #31 brings $29.99 versus $0.99 raw — a $29.00 spread that covers an economy-tier ~$25 grading fee. A PSA 9 ($12.48) only about breaks even after fees, so the case rests on gemming.
Full grading break-even for Roy Halladay #31: fee tiers, best grader, gem-rate math →
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Roy Halladay #31 — frequently asked
How much is Roy Halladay #31 (Baseball Cards 2004 Upper Deck Diamond Collection Pro Sigs) worth?
As of Sep 4, 2026, Roy Halladay #31 (Baseball Cards 2004 Upper Deck Diamond Collection Pro Sigs): an ungraded near-mint copy sells for about $0.99, a PSA 10 sells for about $29.99, a PSA 9 for about $12.48. Values come from the PriceCharting price guide and are refreshed weekly.
How much is a PSA 10 Roy Halladay #31 worth?
As of Sep 4, 2026, a PSA 10 (Gem Mint) Roy Halladay #31 (Baseball Cards 2004 Upper Deck Diamond Collection Pro Sigs) sells for about $29.99, compared with $0.99 for a raw near-mint copy.
Is Roy Halladay #31 worth grading?
A PSA 10 Roy Halladay #31 brings $29.99 versus $0.99 raw — a $29.00 spread that covers an economy-tier ~$25 grading fee. A PSA 9 ($12.48) only about breaks even after fees, so the case rests on gemming.
Where do these Baseball card prices come from?
Prices are the PriceCharting price guide, refreshed weekly. Raw values reflect near-mint (NM) ungraded copies; graded values are per grading company and grade.