Is Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 worth grading?
Entertainment · 1989 O-Pee-Chee Nintendo · full price guide →
Strong grading candidate — 38× premium in PSA 10
A PSA 10 Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 sells for $150 against $3.99 raw: a $146 spread, 38× the ungraded price. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
- Raw (NM)
- $3.99
- PSA 10
- $150
- Gem premium
- 38×
- As of
- Aug 16, 2026
Break-even by outcome and fee
| If it comes back… | Sells for | Economy / bulk (~$25.00) | Standard (~$50.00) | Express (~$150) |
|---|---|---|---|---|
| Gem — PSA 10 | $150 | +$121 | +$96.01 | −$3.99 |
Net = sale price − $3.99 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.
Which grader pays the most — and what a 10 takes
All centering standards →| Grader | 10 sells for | vs best | Front centering for a 10 | Back |
|---|---|---|---|---|
| BGS 10 | $195 | best | 55/45 | 70/30 |
| PSA 10 | $150 | −$45.00 | 55/45 | 75/25 |
| CGC 10 | $90.00 | −$105 | 55/45 | 75/25 |
| SGC 10 | $90.00 | −$105 | 55/45 | 75/25 |
Tolerances are each company's published centering standard for its top grade; surface, corners and edges must also be clean. Centering is the one you can measure yourself before you pay.
Full grade ladder
Raw conditions & history →| Grade | PSA | CGC | BGS | SGC |
|---|---|---|---|---|
| 10 | $150 | $90.00 | $195 | $90.00 |
Run your own numbers
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Other 1989 O-Pee-Chee Nintendo cards worth checking
Full set checklist →Grading Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 — FAQ
Is Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 worth grading?
A PSA 10 Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 sells for $150 against $3.99 raw: a $146 spread, 38× the ungraded price. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.
How much is a PSA 10 Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 worth compared with raw?
A PSA 10 Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 (1989 O-Pee-Chee Nintendo) sells for about $150 versus $3.99 for a raw near-mint copy — a 38× premium as of Aug 16, 2026.
Which grading company is best for Hammer Bros / Mushroom Retainer / Magic Mushrooms #31?
By resale value, BGS 10 leads at $195, ahead of PSA 10 at $150. Fees and turnaround differ, so the best-paying label is not always the best net.
What centering does Hammer Bros / Mushroom Retainer / Magic Mushrooms #31 need for a BGS 10?
BGS publishes 55/45 front and 70/30 back centering as the tolerance for a 10 (Gem Mint). Off-center copies are capped below the top grade regardless of surface — measure yours before paying the fee.
Is your entertainment card centered well enough to grade?
Centering makes or breaks a PSA 10. Scan any card with Midpoint to measure its exact centering, get a grade estimate, and see what your copy is actually worth.
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