Comic Books have increasingly become a mainstream collectible investment. Copies of Action Comics #1, Detective #27 and Amazing Fantasy #15 have sold for $1 million or more. Not too bad for a 10-12 cent funny books! Each age and genre has generated their fair share of “must have” blue chip comic books. As they are uploaded to Comic Book Secrets, each title is linked to the investment survey for the specific comic so you can see why they are important, the price range, outlook, and current issues for sale.

Most Valuable Key Golden Age Comics

Action Comics 1 – Origin/First Superman
All-American Comics 16 – First Green Lantern
Batman 1 – First self titled Batman
Captain America Comics 1 – Origin/First Captain America
Captain Marvel Adventures 1 – First self titled Captain Marvel
Detective Comics 27 -Origin/First Appearance Batman
Flash Comics 1 – Origin/First Appearance Golden Age Flash
Marvel Comics 1 – The first Marvel/Timely comic with Human Torch, Sub-mariner
Superman 1 – First self titled Superman
Whiz 2 (#1) – Origin/First Appearance Captain Marvel

Most Valuable Silver Age Comic Books

Amazing Fantasy #15
Fantastic Four #1
Incredible Hulk #1
Showcase #4
Amazing Spider-man #1
X-men #1
Journey into Mystery #83
Tales of Suspense #39
Showcase #8
Brave and the Bold #28
The Flash #105
Justice League of America #1
Showcase #9
Adventure Comics #247
Fantastic Four #5
Tales to Astonish #27
Avengers #1
Showcase #22
Green Lantern #1

Most Valuable Key Bronze Age Key Comic Books
All Star Western #10 – First Jonah Hex
Amazing Adventures 11 – First New Beast
Amazing Spider-Man 121 – Death of Gwen Stacy
Amazing Spider-Man 122 – Death of Green Goblin
Amazing Spider-Man 129 – First Punisher
Batman 232 – First Ras Al Ghul
Batman 234 – First Harvey Dent/Two-Face in the modern age
Cerebus 1 – First Cerebus and widely successful independent comic book
Conan 1 – First Appearance Conan
Daredevil 131 – First New Bullseye
Daredevil 158 – First Frank Miller on Daredevil
Daredevil 168 – First Elektra
Daredevil 181 – Death of Elektra
Fear 10 First Man -Thing in his own series
Giant Sized X-Men 1 – New X-Men
Green Lantern 76 – First Neal Adams
House of Secrets 92 – First Swamp Thing
Hulk 181 – First Full Wolverine
Iron Fist 14 – First Sabretooth
Iron Man 55 – First Thanos
Marvel Feature 1 – Origin/First Appearance Defenders
Marvel Premiere 15 – Origin/First Appearance Iron Fist
Marvel Spotlight 2 – First Werewolf By Night
Marvel Spotlight 5 – Origin/First Appearance Ghost Rider
Special Marvel Edition 15 – First Master of Kung-Fu (Shang -Chi)
Superman 233 – Classic Neal Adams Cover
X-Men 94 – New X-Men series begins
X-Men 101 – First Phoenix
X-Men 137 – Death of Phoenix/Dark Phoenix

Think about this, according to the first edition of the Overstreet Comic Book Price Guide, a collector could have picked up a near mint copy of Detective Comics #27 for about $275, a book that sold in February 2010 for over $1 million.

Take a look below and see what these comics are currently fetching at auction (if you can even find them for sale!).