Skip to main content

Rare & Key Issues

Batman Adventures #12 explained: Harley Quinn's first comic appearance

Published Sep 14, 2026 · Updated Oct 11, 2026 · 1 min read

Short answerThe Batman Adventures #12 (September 1993) is Harley Quinn's first appearance in comics, a year after her television debut in Batman: The Animated Series. It is the most valuable comic of the 1990s after New Mutants #98 and a standard Modern Age key. Because it was printed in large numbers, the value sits almost entirely in 9.8 copies, newsstand copies and the scarcer second printing.

The issue

"Batgirl: Day One" by Kelley Puckett, Mike Parobeck and Rick Burchett: Harley and Poison Ivy against a rookie Batgirl, in the animated series' art style. Harley wears the red-and-black harlequin costume from the show.

Editions

  • First printing, direct edition — the common copy.
  • First printing, newsstand — same printing, UPC barcode, scarcer in high grade. See Newsstand vs direct edition.
  • Second printing (1993) — scarcer than the first; identified in the indicia.
  • Reprints and facsimiles from 2015 onward — clearly marked and not valuable.

Where the value is

Most surviving copies were bought by collectors and bagged, so 9.4 and 9.6 copies are plentiful. The premium is at 9.8 — see Why is a 9.8 worth so much more? — and for newsstand and second-printing copies in high grade. A CGC 9.8 is in the store.

See First appearance of Harley Quinn, the Harley Quinn character page and the Modern Age collection.

Written by the Rare Comics Collectors grading team. Spotted an error or have a question this guide does not answer? Tell us.

In the vault right now

Browse all listings →
Batman Adventures #25 (DC Comics, 1994), raw, ungraded comic book — front cover
DCRaw

Batman Adventures

#25 · 1994

Not graded
Last copy

DC Comics · Modern Age

Batman Adventures #25

Raw · Not graded

(0)
$23.25
Batman Adventures #13 (DC Comics, 1993), raw comic book in VF+ condition — front cover
DCRaw

Batman Adventures

#13 · 1993

VF+
Last copy

DC Comics · Modern Age

Batman Adventures #13

Raw · VF+

(0)
$7.50
Batman Adventures #16 (Marvel Comics), CGC 9.8 graded comic book, Universal Blue label — front cover in its holder
MarvelCGC

Batman Adventures

#16

9.8
Last copy

Marvel Comics

Batman Adventures #16

CGC 9.8 · Universal Blue

(0)
$243.74
Batman Adventures #12 (DC Comics, 2015), CGC 9.4 graded comic book, Universal Blue label — front cover in its holder
DCCGC

Batman Adventures

#12 · 2015

9.4
Last copy

DC Comics · Modern Age

Batman Adventures #12

CGC 9.4 · Universal Blue

(0)
$74.73
  • Key issues

    1st Harley Quinn Comic: Batman Adventures #12 and What Grade Does

    Harley Quinn's first comic is The Batman Adventures #12, cover-dated September 1993 from DC Comics. It was printed in large numbers, so its price depends mostly on grade: 9.8 copies, newsstand copies and the scarcer second printing carry the premium.

    Updated Oct 11, 2026

  • Key issues

    Batman Quotes vs. Batman Comics: Key Issues Collectors Chase

    Most famous Batman quotes come from films, TV and animation rather than the original comics, and no quote makes a comic more valuable. What collectors pay for is a key issue, such as Detective Comics #27, in a high certified grade.

    Updated Oct 11, 2026

  • Collecting

    Tony Stark's First Comic Appearance: Tales of Suspense #39

    Tony Stark's first comic appearance is Tales of Suspense #39, cover-dated March 1963. Iron Man debuts in the same story, so there is no separate Tony Stark first appearance book: one issue introduces both the man and the armour.

    Updated Oct 11, 2026

  • Collecting

    What are the ages of comic books? Golden, Silver, Bronze, Copper and Modern explained

    Collectors divide American comics into eras: the Golden Age (1938 to the mid-1950s), the Silver Age (1956 to about 1970), the Bronze Age (about 1970 to 1985), the Copper Age (about 1985 to 1991) and the Modern Age (1991 to today). The boundaries are conventions rather than official dates, but each era has its own print runs, survival rates, paper and pricing, which is why listings and price guides always state one.

    Updated Oct 11, 2026

  • Collecting

    What is a key issue in comics?

    A key issue is a comic that matters for a reason beyond its story: the first appearance of a character, an origin, a first issue, a death, a famous cover, a creator's debut, or the first appearance of a costume or team. Keys are the books that hold and grow value because demand is tied to the character or event rather than to the issue's rarity alone.

    Updated Oct 10, 2026

  • Collecting

    First appearance vs cameo: what is the difference?

    A cameo is a brief appearance — often a single panel, a shadowed figure, or a last-page teaser — while a first full appearance is the issue in which the character plays a real part in the story. The market usually prices the first full appearance higher, but when the cameo is the first time the character is seen at all, both issues become keys. Incredible Hulk #180 (cameo) and #181 (first full appearance) for Wolverine is the classic example.

    Updated Oct 10, 2026