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Featuring issues that have multiple instances of significance 

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Uncanny X-Men #129

Marvel ⋅ 1980

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Uncanny X-Men #129
 
Low
$50
Mid
$125
High
$350

Key Facts

The Dark Phoenix Saga Part 1

1st appearance of Kitty Pryde

1st appearance of Emma Frost, the White Queen

1st cameo team appearance of The Hellfire Club, in shadows

Star Wars #1

Marvel ⋅ 1977

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Star Wars #1
 
Low
$30
Mid
$90
High
$300

Key Facts

Issues #1 - #6 are an adaptation of 'Star Wars: A New Hope'

1st appearance of Darth Vader

1st appearance of Luke Skywalker

1st appearance of Princess Leia

1st appearance of C-3PO and R2-D2

1st appearance of Grand Moff Tarkin

1st appearance of Beru and Owen Lars

Introduction of Stormtroopers

1st cover appearance of Obi Wan Kenobi and Han Solo (not in story)

📖 Reading Order: read Star Wars (1977) #1 - #6, then Princess Leia #1

Fantastic Four Annual #6

Marvel ⋅ 1968

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Fantastic Four Annual #6
 
Low
$80
Mid
$150
High
$700

Key Facts

1st appearance of Annihilus, ruler of the Negative Zone

1st appearance of Franklin Richards, as an unnamed infant, considered by Marvel to be the most powerful mutant in the Marvel Universe

[November 2024 - it is rumored Marvel is looking to cast a child in the role of Franklin Richards who will play the character through various ages in future projects]

Introduction of the Cosmic Control Rod, a weapon used by Annihilus that manipulates matter

Uncanny X-Men #4

Marvel ⋅ 1964

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Uncanny X-Men #4
 
Low
$525
Mid
$2.1k
High
$10.5k

Key Facts

1st team appearance of the Brotherhood of Evil Mutants led by Magneto

1st appearance of Scarlet Witch

1st appearance of Quicksilver

1st appearance Mastermind, later becomes Jason Wyngarde

1st appearance of Toad

2nd appearance of Magneto

Although the Scarlet Witch's costume is colored green on the cover, it is red in the story

[December 2023 - a Brotherhood of Mutants projects is rumored to be in discussion for the MCU slate]

Uncanny X-Men #1

Marvel ⋅ 1963

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Uncanny X-Men #1
 
Low
$6.2k
Mid
$14k
High
$85k

Key Facts

1st team appearance of the X-Men: Cyclops, Jean Grey aka Marvel Girl, Iceman, Angel, Beast, Professor X

1st appearance of Magneto

Homo Superior concept, coined by Magneto to describe humans born with special abilities introduced in this issue

Journey Into Mystery #85

Marvel ⋅ 1962

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Journey Into Mystery #85
 
Low
$950
Mid
$4.7k
High
$14k

Key Facts

1st appearance of Loki, the Norse god of mischief

1st appearance of Balder, half-brother of Thor

1st appearance of Heimdall, guardian of Bifrost

1st appearance of Tyr, the Norse god of war

1st cameo appearance of Odin, the All-Father, seen from behind

3rd appearance of Thor

Iron Man #55

Marvel ⋅ 1973

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Iron Man #55
 
Low
$135
Mid
$480
High
$1.4k

Key Facts

1st appearance of Thanos, an Eternal from Titan born with the Deviants gene

1st cameo appearance of Eros aka Starfox, brother of Thanos

1st appearance of Kronos, Grandfather of Thanos

1st appearance of Mentor, father of Thanos

1st appearance of Drax the Destroyer, created by Kronus to kill Thanos

1st appearance of the Blood Brothers

Fantastic Four #45

Marvel ⋅ 1965

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Fantastic Four #45
 
Low
$110
Mid
$380
High
$1.5k

Key Facts

1st team appearance of the Inhumans, a race created by the Kree: Triton, Karnak, Lockjaw, Gorgon, Medusa, Crystal and Black Bolt

1st cameo appearance of Black Bolt

1st appearance of Crystal, ability to manipulate the elements

1st appearance of Karnak, a skilled fighter and advisor to Black Bolt

1st appearance of Triton

Giant-Size X-Men #1

Marvel ⋅ 1975

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Giant-Size X-Men #1
 
Low
$700
Mid
$2.2k
High
$7k

Key Facts

1st appearance of the new X-Men: Storm (1st), Nightcrawler (1st), Colossus (1st), Thunderbird (1st), Wolverine (3rd)

Many resources label this the 2nd full appearance of Wolverine and The Incredible Hulk #182 a second cameo

1st appearance of Illyana Rasputin as a child, later becomes Magik

Introduction of Krakoa, the Living Island

First use of the sound effect 'snikt' associated with Wolverine's claws

Amazing Spider-Man Annual #1

Marvel ⋅ 1964

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Amazing Spider-Man Annual #1
 
Low
$410
Mid
$1.6k
High
$6.3k

Key Facts

1st team appearance of the Sinister Six: Doctor Octopus, Kraven, Vulture, Electro, Mysterio, Sandman

3rd appearance of Kraven, Vulture, Electro, Mysterio and Sandman

Reprinted in Marvel Tales #150

Character profiles of Dr. Doom, the Lizard and others

Additional pages explain how Spider-Man's powers and gadgetry work

Strange Tales #126

Marvel ⋅ 1964

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Strange Tales #126
 
Low
$130
Mid
$620
High
$1.7k

Key Facts

1st appearance of Dormammu, ruler of the Dark Dimension

1st appearance of Clea, future wife of Doctor Strange, unnamed

Doctor Strange first uses the phrase 'By The Hoary Hosts of Hoggoth

Strange Tales #110

Marvel ⋅ 1963

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Strange Tales #110
 
Low
$1.7k
Mid
$8.6k
High
$27k

Key Facts

1st appearance of Doctor Strange

1st appearance of the Ancient One, former Sorcerer Supreme

1st appearance of Wong, Doctor Strange's assistant

1st cameo appearance of Nightmare, multiple panels, named but obscured by shadows

Fantastic Four #53

Marvel ⋅ 1966

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Fantastic Four #53
 
Low
$40
Mid
$120
High
$400

Key Facts

1st appearance and origin of Klaw

2nd appearance and origin of the Black Panther

1st appearance of T'Chaka, Black Panther's father

First mention of Wakandan Vibranium metal

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