Is Don Mattingly [Artist's Proof] #139 worth grading?
Baseball · Baseball Cards 1995 Sportflix UC3 · full price guide →
Worth grading — even a PSA 9 beats raw
A Grade 9.5 Don Mattingly [Artist's Proof] #139 sells for $60.00 against $8.50 raw: a $51.50 spread, 7.1× the ungraded price. Even a PSA 9 ($54.86) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $8.50
- Grade 9.5
- $60.00
- PSA 9
- $54.86
- Gem premium
- 7.1×
- As of
- Sep 4, 2026
Break-even by outcome and fee
| If it comes back… | Sells for | Economy / bulk (~$25.00) | Standard (~$50.00) | Express (~$150) |
|---|---|---|---|---|
| Gem — Grade 9.5 | $60.00 | +$26.50 | +$1.50 | −$98.50 |
| PSA 9 | $54.86 | +$21.36 | −$3.64 | −$104 |
Net = sale price − $8.50 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.
Expected value — how often does it need to gem?
| Chance it gems | Expected sale | Expected net (standard fee) |
|---|---|---|
| 25% | $56.14 | −$2.36 |
| 50% | $57.43 | −$1.07 |
| 75% | $58.72 | +$0.22 |
Break-even gem rate at the standard fee: about 71%. Centering is the usual reason a clean copy misses — measure it before you decide.
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Grading Don Mattingly [Artist's Proof] #139 — FAQ
Is Don Mattingly [Artist's Proof] #139 worth grading?
A Grade 9.5 Don Mattingly [Artist's Proof] #139 sells for $60.00 against $8.50 raw: a $51.50 spread, 7.1× the ungraded price. Even a PSA 9 ($54.86) clears the raw price after an economy-tier ~$25 fee, so a near-miss still comes out ahead. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
What gem rate makes grading Don Mattingly [Artist's Proof] #139 break even?
At a standard ~$50 fee, submitting Don Mattingly [Artist's Proof] #139 breaks even when it gems about 71% of the time (a miss assumed to sell at the PSA 9 price of $54.86).
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