DC Comics· 1970★ Key Issue

Detective Comics #400

1st appearance of Man-Bat (Kirk Langstrom)

Trap checkDon't buy these

32 listingson eBay right now look like this issue but aren't it — usually the cheapest ones on the page. Here's what's wrong with each, so you don't buy the wrong book.

Wrong volume$1.95
2022 DC PHYSICAL CARD DETECTIVE COMICS #400 BATMAN COMICS A71320
Same title and issue number, but a different relaunch. Daredevil #1 exists in six volumes — the 1964 key and the 2023 reboot are not the same book.
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Not the comic$1.99
Detective Comics #400 (1970) DC Ch. 2 Hybrid Trading Card Random Mint
A poster, empty slab, or other merchandise — not the book itself.
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Not the comic$1.99
Detective Comics #400 (1970) DC Ch. 2 Hybrid Trading Card Random Mint
A poster, empty slab, or other merchandise — not the book itself.
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Not the comic$1.99
DC Trading Card Detective Comics #400 1970 1st App Man-Bat Mint A68536 Physical
A poster, empty slab, or other merchandise — not the book itself.
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Facsimile / reprint$3.99
Detective Comics #400 2024 facsimile edition NM comic featuring Man-Bat!
A modern reprint of the original cover. Often looks identical in photos, but it is not the collectible book — these sell for a few dollars.
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Facsimile / reprint$3.99
DETECTIVE COMICS #400 FACSIMILE EDITION CVR A NEAL ADAMS
A modern reprint of the original cover. Often looks identical in photos, but it is not the collectible book — these sell for a few dollars.
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Not the comic$3.99
Detective Comics 400 cover art 2x3" fridge magnet DC Comics
A poster, empty slab, or other merchandise — not the book itself.
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Facsimile / reprint$4.20
Detective Comics Facsimile Edition #400A NM 2024 Stock Image
A modern reprint of the original cover. Often looks identical in photos, but it is not the collectible book — these sell for a few dollars.
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Guide value · CGC 9.8

$6,737

Estimated current value from PriceCharting

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An estimate of what this grade is worth today, not a record of any sale. Guide values are trailing aggregates, so they lag a fast-moving book — a copy that just sold at auction may have gone for well above or below this.

Where the copies sit

Only 1 copy on the market at this grade — nothing to compare it against.

Guide value

Updated	Grade	Estimate
Aug 29, 2026	CGC 9.8	$6,736.66

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Gradesearching: Detective Comics #400 1970 CGC 9.8