Fantastic Four  (1961)

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Low
$40
Mid
$125
High
$740

Key Facts

First crossover of the X-Men in the Fantastic Four title

2nd appearance of the Mad Thinker

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$45
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$140
High
$450

Key Facts

1st cover appearance of the Watcher

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$65
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$170
High
$680

Key Facts

1st appearance of Diablo, a 9th century alchemist who sold his soul to Mephisto for an extended lifespan

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$20
Mid
$60
High
$300

Key Facts

1st appearance of Greg Gideon, a wealthy businessman who used his fortune to vex the Fantastic Four

1st appearance of Thomas Gideon who later becomes Glorian

Marvel ⋅ 1975

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$2
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$8
High
$30

UK Edition ⋅ Marvel ⋅ 1975

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$2
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$10
High
$35

Marvel ⋅ 1981

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$1
Mid
$2
High
$3

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