Collecting Thanos for Beginners: Bronze Age Keys, Grades, and Honest Prices

Thanos, the Mad Titan, is a Bronze Age Marvel character. There are no Golden Age or Silver Age Thanos keys — searching for issues before 1973 is a dead end. Jim Starlin created him in February 1973 in Iron Man #55 and immediately developed the character across an ambitious cosmic saga running through Captain Marvel, Warlock, and The Avengers. Decades later, his MCU adaptation — played by Josh Brolin in Avengers: Infinity War ($2 billion worldwide) and Avengers: Endgame ($2.79 billion worldwide) — made him one of the most recognisable villains in popular culture, and drove his key issues to prices that would have been unthinkable before 2018.

This guide sticks to the verifiable: eBay medians from our estimator (eBay.fr + eBay.com, June 2026) and records documented by specialist press and auction houses. The Iron Man #55 eBay median is «blended» — it combines all printings and all grades and is therefore naturally low. Any issue where our estimator returns fewer than 15 listings is not given a median price here.

Thanos key issues at a glance (real data, June 2026)

Every Thanos key is a Bronze Age book — his original run spans 1973 to 1977, with a major modern revival starting in 1990. There are no Golden Age or Silver Age Thanos issues. The eBay medians below reflect copies across all grades — entry-level pricing, not graded high-grade values.

Record sources: Bleeding Cool, sellmycomicbooks.com, GoCollect. The Iron Man #55 eBay median is a blended figure across all printings and grades — it does not represent the value of a high-grade copy.

Iron Man #55 (1973): the key issue, honestly

Published in February 1973, Iron Man #55 is the foundation of any Thanos collection. Jim Starlin conceived and drew the character; Mike Friedrich scripted the issue. In a single comic, Starlin also introduced Drax the Destroyer, Mentor, Kronos, Starfox, and the Blood Brothers — a density of first appearances that is extraordinarily rare for its era. The issue now appears on Overstreet's list of top Bronze Age keys.

Our estimator returns a median of €9 across 73 listings. That figure is a blended median: it aggregates all printings and all grades, and is naturally pulled down by the many low-grade and ungraded copies on the market. A VF copy can typically be found between €50 and €150 depending on the seller and condition. For graded CGC copies, the premium is steep: a CGC 9.8 sold for $13,025 (Comiclink, 2013) and was trading around $9,000 in 2022. For a beginner, an ungraded copy in G/VG condition (approximately CGC 3.0–4.0) is the realistic entry point — prioritise authenticity over speculation, and be patient finding a fairly priced copy.

The Captain Marvel saga (1973–74): the Thanos War

Immediately after Iron Man #55, Jim Starlin took over Captain Marvel from issue #25 (March 1973) and developed across nine issues — through issue #33 (January 1974) — an ambitious cosmic arc known as the «Thanos War». Thanos, in pursuit of the Cosmic Cube, faces the original Captain Marvel (Mar-Vell) in a series of confrontations that defined the character's early mythology. Captain Marvel #28 is frequently cited as the arc's centrepiece issue.

Our eBay estimator does not cover the original Captain Marvel vol.1 series: no reliable median is available for these issues through our tool. These Bronze Age books are scarcer than Iron Man #55 in high grade but attract somewhat less mainstream demand — they remain accessible in mid-grade on a modest budget. For a beginner, they make a rewarding complement to the cornerstone key once that is secured.

Avengers #125 and Silver Surfer #34: the accessible keys

For a beginner building a coherent Thanos collection without breaking the bank, Avengers #125 (July 1974) and Silver Surfer #34 (February 1990) offer two solid, budget-friendly entry points. Avengers #125 is a Thanos War crossover: our estimator returns a median of €9 across 54 listings — genuinely affordable for a legitimate Bronze Age key. Silver Surfer #34 marks Thanos's return after thirteen years absent from Marvel's pages, directly setting up The Infinity Gauntlet. Our estimator returns a median of €19 across 55 listings, with the high end of the range at €38 — still reasonable for a book of this importance. Building around these two alongside Iron Man #55 gives a new collector a strong thematic spine without overextending.

The Infinity Gauntlet (1991): the modern essential

Published from July to December 1991, The Infinity Gauntlet is a six-issue miniseries written by Jim Starlin, with art by George Pérez (issues #1–3) and Ron Lim (issues #4–6). Thanos, wielding all six Infinity Gems, erases half of all life in the universe — the storyline that directly inspired Avengers: Infinity War on screen. Our eBay estimator does not cover this series as a distinct entry. CGC 9.8 copies of issue #1 trade actively on eBay and specialist platforms, though no single record sale has been consolidated and widely reported in specialist press. As a Copper/Modern Age book produced in large print runs, it survives in high grade far more readily than the Bronze Age keys — making it one of the more accessible pieces of the Thanos puzzle for a beginner working within a budget.