Key Collector Comics

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Batman #258
DC ⋅ 1974
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Batman #258
 
Low
$15
Mid
$55
High
$165

Key Facts

First mention of Arkham Hospital, later renamed Arkham Asylum

Batman #326
Non-Key
DC ⋅ 1980
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Batman #326
 
Low
$1
Mid
$2
High
$8

Key Facts

First mention of the name Arkham Asylum, previously Arkham Hospital

Saga of the Swamp Thing #52
DC ⋅ 1986
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Saga of the Swamp Thing #52
 
Low
$1
Mid
$3
High
$12

Key Facts

Cover art by Stephen Bissette depicting Swamp Thing as the ivy on the gates of Arkham Asylum

Arkham Asylum: A Serious House on Serious Earth
DC ⋅ 1989
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Arkham Asylum: A Serious House on Serious Earth
 
Low
$3
Mid
$9
High
$35

Key Facts

1st appearance of Amadeus Arkham, a social reformer who established Arkham Asylum

Detective Comics #1003
DC ⋅ 2019
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Detective Comics #1003
 
Low
$1
Mid
$2
High
$4

Key Facts

Identity of Arkham Knight revealed to be Astrid Arkham, a descendant of the family that established Arkham Asylum

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