Every age of comics has special 1st appearances. The 70s and early 80s are no exception as you can see below.

IRON MAN 140 VF+ 1ST FORCE 1 APPEARANCE NEWSSTAND MARVEL COMIC
IRON MAN 140 VF+ 1ST FORCE 1 APPEARANCE NEWSSTAND MARVEL COMIC
$3.05
Time Remaining: 51m
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Kull the Conqueror 1 1st Comic Book Appearance 1971 Grade 30 WH
Kull the Conqueror 1 1st Comic Book Appearance 1971 Grade 30 WH
$9.99
Time Remaining: 1h 40m
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BLACK LIGHTNING 1  Vol 1  1st appearance  origin  1977  DC  VF VF
BLACK LIGHTNING 1 Vol 1 1st appearance origin 1977 DC VF VF
$49.99
Time Remaining: 1h 45m
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CGC 96 FIRESTORM 1 DC COMICS 3 1978 ORIGIN  1ST APPEARANCE OF FIRESTORM
CGC 96 FIRESTORM 1 DC COMICS 3 1978 ORIGIN 1ST APPEARANCE OF FIRESTORM
$149.99
Time Remaining: 2h 14m
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DC 100 Page Super Spectacular 22 strict VG 1st appearance Kid Flash New Costume
DC 100 Page Super Spectacular 22 strict VG 1st appearance Kid Flash New Costume
$12.00
Time Remaining: 2h 42m
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Batman 357  358 Key Issue 1st Appearance Of Killer Croc  Jason Todd DC Comic
Batman 357 358 Key Issue 1st Appearance Of Killer Croc Jason Todd DC Comic
$109.95
Time Remaining: 2h 52m
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X Factor 5 VF NM 1st Cameo of Appearance of Apocalypse SKU15329 25 Off
X Factor 5 VF NM 1st Cameo of Appearance of Apocalypse SKU15329 25 Off
$59.99
Time Remaining: 2h 53m
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Batman 232 1st Appearance Ras Al Ghul Bronze Age Key Issue Neal Adams Nice
Batman 232 1st Appearance Ras Al Ghul Bronze Age Key Issue Neal Adams Nice
$359.95
Time Remaining: 2h 57m
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Little Eva  1 strict VG 1st appearance Little Eva
Little Eva 1 strict VG 1st appearance Little Eva
$36.00
Time Remaining: 4h 12m
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The Avengers 158 April 1977 1st appearance Graviton Jim Shooter scripts begin
The Avengers 158 April 1977 1st appearance Graviton Jim Shooter scripts begin
$20.00
Time Remaining: 4h 19m
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Life with Archie  80 strict VF NM 1st appearance Angel
Life with Archie 80 strict VF NM 1st appearance Angel
$26.00
Time Remaining: 4h 35m
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Mighty Thor 338  339 1983 2nd Appearance of Beta Ray Bill 1st Stormbreaker
Mighty Thor 338 339 1983 2nd Appearance of Beta Ray Bill 1st Stormbreaker
$24.99
Time Remaining: 4h 37m
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Life with Archie  59 strict FN VF 1st appearance The Bowman
Life with Archie 59 strict FN VF 1st appearance The Bowman
$20.00
Time Remaining: 4h 40m
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Life with Archie  56 strict VF NM 1st appearance The Flamethrower
Life with Archie 56 strict VF NM 1st appearance The Flamethrower
$44.00
Time Remaining: 4h 40m
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The Avengers 115 strict VF 80 High Grade 1st Appearance Skol Many more
The Avengers 115 strict VF 80 High Grade 1st Appearance Skol Many more
$19.00
Time Remaining: 4h 41m
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Kid Colt Outlaw  124 strict GD VG 1st appearance The Phantom Raider
Kid Colt Outlaw 124 strict GD VG 1st appearance The Phantom Raider
$7.50
Time Remaining: 4h 45m
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Kid Colt Outlaw  123 strict VF NM 1st appearance Ringo Barker
Kid Colt Outlaw 123 strict VF NM 1st appearance Ringo Barker
$53.00
Time Remaining: 4h 45m
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Kid Colt Outlaw  120 strict VG FN 1st appearance The Cragsons
Kid Colt Outlaw 120 strict VG FN 1st appearance The Cragsons
$15.00
Time Remaining: 4h 46m
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Ka Zar  1 strict NM 1st appearance Ka Zar in his own title
Ka Zar 1 strict NM 1st appearance Ka Zar in his own title
$18.00
Time Remaining: 4h 54m
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Superman 237 strict VG 40 Appearance New Superman pay 1st shipping fee
Superman 237 strict VG 40 Appearance New Superman pay 1st shipping fee
$10.00
Time Remaining: 4h 58m
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Superman 236 strict VG+ 45 Appearance New Superman pay 1st shipping fee
Superman 236 strict VG+ 45 Appearance New Superman pay 1st shipping fee
$11.25
Time Remaining: 4h 59m
Buy It Now for only: $11.25
KOBRA 1 VF+ 1976 1ST APPEARANCE KOBRA BY JACK KIRBY BLACK LIGHTNING TV SHOW
KOBRA 1 VF+ 1976 1ST APPEARANCE KOBRA BY JACK KIRBY BLACK LIGHTNING TV SHOW
$15.28
Time Remaining: 5h 16m
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Iron Jaw 1 High Grade NM 1st appearance Cover by Neal Adams Atlas Comics
Iron Jaw 1 High Grade NM 1st appearance Cover by Neal Adams Atlas Comics
$2.99
Time Remaining: 5h 17m
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Batman 318 1st appearance of Firebug VF+
Batman 318 1st appearance of Firebug VF+
$4.99
Time Remaining: 5h 20m
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Batman 358 1st full appearance Killer Croc F VF
Batman 358 1st full appearance Killer Croc F VF
$8.99 (1 Bid)
Time Remaining: 5h 21m
DOCTOR STRANGE 15 70 FN VF 1st James Mandarin Appearance 1976 Marvel
DOCTOR STRANGE 15 70 FN VF 1st James Mandarin Appearance 1976 Marvel
$1.51 (2 Bids)
Time Remaining: 5h 43m
Amazing Spider Man 101 cgc 1st appearance of morbius sig 2x stan lee romita
Amazing Spider Man 101 cgc 1st appearance of morbius sig 2x stan lee romita
$749.00
Time Remaining: 6h 19m
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Luke Cage Power Man No 18 1st Appearance of Steeplejack Marvel 1974 FN
Luke Cage Power Man No 18 1st Appearance of Steeplejack Marvel 1974 FN
$15.00
Time Remaining: 6h 21m
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Captain America 152 Aug 1972 Marvel 80 VF 1st Appearance of BOSS MORGAN
Captain America 152 Aug 1972 Marvel 80 VF 1st Appearance of BOSS MORGAN
$20.00
Time Remaining: 6h 40m
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The Uncanny X Men 156 Apr 1982 Marvel 85 VF+ 1st Appearance of SIKORSKY
The Uncanny X Men 156 Apr 1982 Marvel 85 VF+ 1st Appearance of SIKORSKY
$10.00
Time Remaining: 6h 41m
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UNCANNY X MEN 154 1ST SIDRI KEY APPEARANCE OF STARJAMMERS NM+ 99 98
UNCANNY X MEN 154 1ST SIDRI KEY APPEARANCE OF STARJAMMERS NM+ 99 98
$79.99
Time Remaining: 6h 45m
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MISTER MIRACLE 1 CGC 94 UNIVERSAL GRADE 1st APPEARANCE MISTER MIRACLE
MISTER MIRACLE 1 CGC 94 UNIVERSAL GRADE 1st APPEARANCE MISTER MIRACLE
$570.00
Time Remaining: 6h 53m
Buy It Now for only: $570.00
THE AVENGERS ANNUAL 10 90 1ST APPEARANCE OF ROGUE HUGE KEY
THE AVENGERS ANNUAL 10 90 1ST APPEARANCE OF ROGUE HUGE KEY
$74.97
Time Remaining: 7h 9m
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THE AVENGERS ANNUAL 10 90 1ST APPEARANCE OF ROGUE KEY ISSUE
THE AVENGERS ANNUAL 10 90 1ST APPEARANCE OF ROGUE KEY ISSUE
$74.97
Time Remaining: 7h 9m
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FANTASTIC FOUR 186 189 192 VOLUME 1 KIRBY 1ST APPEARANCE 1978 HIGH GRADE NOT 150
FANTASTIC FOUR 186 189 192 VOLUME 1 KIRBY 1ST APPEARANCE 1978 HIGH GRADE NOT 150
$24.99
Time Remaining: 7h 12m
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Marvel 1980 MARVEL PREMIERE 57 1st US TV DOCTOR WHO appearance key
Marvel 1980 MARVEL PREMIERE 57 1st US TV DOCTOR WHO appearance key
$4.99
Time Remaining: 7h 26m
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MARVEL SPOTLIGHT 32 VG FN 1ST APPEARANCE  ORIGIN OF SPIDER WOMAN SPIDERVERSE
MARVEL SPOTLIGHT 32 VG FN 1ST APPEARANCE ORIGIN OF SPIDER WOMAN SPIDERVERSE
$44.95
Time Remaining: 7h 30m
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GI JOE 23  VF 1ST APPEARANCE OF STORM SHADOW MARVEL COMICS 1984
GI JOE 23 VF 1ST APPEARANCE OF STORM SHADOW MARVEL COMICS 1984
$50.00
Time Remaining: 7h 46m
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Supergirl 1st Series no7 Zatanna Appearance VG 120916DBC
Supergirl 1st Series no7 Zatanna Appearance VG 120916DBC
$14.99
Time Remaining: 7h 47m
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MICRONAUTS 8 RARE 1ST APPEARANCE OF CAPTAIN UNIVERSE SEE MY OTHER KEYS
MICRONAUTS 8 RARE 1ST APPEARANCE OF CAPTAIN UNIVERSE SEE MY OTHER KEYS
$20.99
Time Remaining: 7h 58m
Buy It Now for only: $20.99