Adventures into the Unknown #18 (1951) — Comic Book Value
Adventures Into The UnknownWhat Adventures into the Unknown #18 (1951) is worth — ungraded and CGC graded (6.0, 8.0).
Adventures into the Unknown #18 (1951) value — Ungraded $38 · Grade 6.0 $140 · Grade 8.0 $158. Prices updated August 2026.
Series · Adventures Into The Unknown
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Value by grade
$38
Ungraded
3.7×
$140
Grade 6.0
4.2×
$158
Grade 8.0
Real sold prices per grade — the Grade 8.0 premium on this card is 4.2× raw.
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Item details
- Series
- Adventures Into The Unknown
Adventures into the Unknown #18 (1951) comic value
An ungraded copy of Adventures into the Unknown #18 (1951) averages around $38. A CGC 6.0 runs about $140, and a CGC 8.0 commands $158.
What drives the price
Grade is everything in comics — spine ticks, page color, and restoration decide the number, and the jump from raw to high grade can be 10×+. Key issues (first appearances, origins, deaths) carry the biggest premiums, and early printings beat reprints.
Price guide
Sold values by grade vs. what sellers ask today
| Condition | Value | Based on |
|---|---|---|
| Ungraded | $38 | eBay sold comps |
| Grade 6.0 | $140 | eBay sold comps |
| Grade 8.0 | $158 | eBay sold comps |
Frequently asked questions
- What is the starting resale price for this comic?
- The ungraded version of Adventures into the Unknown #18 is currently valued around $38.
- How much more is a high-grade copy worth?
- A Grade 8.0 copy sells for $158, significantly higher than the ungraded price.
- What is the price point for a mid-grade copy?
- A copy graded 6.0 can be found on the market for approximately $141.