Detective Comics #27 (1939)
The historic debut of Batman in 'The Case of the Chemical Syndicate'. One of the top two most valuable comic books in history.
Estimated Market Value
Live Market Benchmark$1.8M
Value Range: $120.0K (Low Raw) – $3.4M (CGC High-Grade)
Guide data reviewed July 2026. Estimates are informational and vary by edition, condition, and completed-sale timing. Read the valuation disclaimer.
🏛️ CGC Census & Population Rarity
Total Graded copies
71
CGC 9.8 Population
1
Price by Condition (CGC Grade Matrix)
| Condition | Estimated Value |
|---|---|
| Poor (P 1.0) | $120.0K |
| Good (G 2.0) | $350.0K |
| Fine (F 6.0) | $950.0K |
| Very Fine (VF 8.0) | $2.1M |
| Near Mint (NM 9.4) | $3.1M |
| Mint (M 9.9) | $3.4M |
* Values are weighted market estimates based on recent auction sales and CGC slab history.
Recent Verified Sales Log
| Date | Grade | Marketplace | Price |
|---|---|---|---|
| 2020-11-19 | CGC 7.0 | Heritage Auctions | $1.5M |
Key Issue Specifications
- Series
- Detective Comics
- Issue
- #27
- Year
- 1939
- Publisher
- DC Comics
- Writer
- Bill Finger
- Cover Artist
- Bob Kane
Characters Featured
Related Key Comics
Detective Comics #27 FAQ
How much is Detective Comics #27 worth?
Detective Comics #27 (1939) has an estimated average market value of $1.8M, ranging from $120.0K in low raw condition to $3.4M or higher in top CGC graded condition.
What is a high-grade CGC copy of Detective Comics #27 worth?
In Near Mint (9.4+) condition, Detective Comics #27 is valued at approximately $3.1M, with Mint (9.9/10.0) copies reaching up to $3.4M.
Why is Detective Comics #27 a key comic book?
Detective Comics #27 is a key issue because: First appearance of Batman (Bruce Wayne) & Commissioner Gordon.. The historic debut of Batman in 'The Case of the Chemical Syndicate'. One of the top two most valuable comic books in history.