Is Mark McGwire #690 worth grading?
Baseball · Baseball Cards 1990 O Pee Chee · full price guide →
Worth grading — even a PSA 9 beats raw
A Grade 9.5 Mark McGwire #690 sells for $37.00 against $2.69 raw: a $34.31 spread, 14× the ungraded price. Even a PSA 9 ($33.73) 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)
- $2.69
- Grade 9.5
- $37.00
- PSA 9
- $33.73
- Gem premium
- 14×
- 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 | $37.00 | +$9.31 | −$15.69 | −$116 |
| PSA 9 | $33.73 | +$6.04 | −$18.96 | −$119 |
| PSA 8 | $6.39 | −$21.30 | −$46.30 | −$146 |
Net = sale price − $2.69 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% | $34.55 | −$18.14 |
| 50% | $35.36 | −$17.33 |
| 75% | $36.18 | −$16.51 |
At the standard fee this submission does not break even at any realistic gem rate unless the miss lands above the 9 price.
Full grade ladder
Raw conditions & history →Run your own numbers
Should I pay this?
Enter the seller’s asking price to see your net outcome per grade.
Other 1990 O Pee Chee cards worth checking
Full set checklist →
Grading Mark McGwire #690 — FAQ
Is Mark McGwire #690 worth grading?
A Grade 9.5 Mark McGwire #690 sells for $37.00 against $2.69 raw: a $34.31 spread, 14× the ungraded price. Even a PSA 9 ($33.73) 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.
Best on iPhone & Android
Check your baseball card in the Midpoint app
Scan with your camera to measure centering to the millimeter, get an AI grade with corner and edge close-ups, see what your copy is worth, and track it in your portfolio. Free to start.
