CGC Grading Guide for Thanos Comics: What to Grade and Why

Thanos is a Bronze Age creation: there are no Silver Age or Golden Age keys for the character. Jim Starlin brought him to life in February 1973 in Iron Man #55, with Mike Friedrich co-writing the script. That dating matters for grading: any seller describing a "Silver Age Thanos key" is either mistaken or describing a different character. The authentic keys fall into two distinct eras — Bronze Age (1973–1977, Starlin's original run) and the modern revival (1990–1991, the return of Thanos and The Infinity Gauntlet).

This guide sticks to the verifiable: eBay medians from our estimator (eBay.fr + eBay.com, June 2026) and records documented by major auction houses and the specialist press. The eBay median for Iron Man #55 (€9, all grades) is a blended median — it includes low-grade copies and conditions across the spectrum. It tells you nothing about the value of a high-grade CGC copy. That gap is precisely what makes grading worthwhile on this issue.

Thanos key issue table: eBay data and CGC values (June 2026)

Sources: mycomicscollection.com eBay estimator (June 2026); Bleeding Cool; sellmycomicbooks.com; GoCollect; ComicLink.

Iron Man #55 (1973): the Thanos comic that earns its grading fee

Published in February 1973, Iron Man #55 is a landmark Bronze Age key. Jim Starlin (plot and pencils) introduces Thanos, the death-obsessed Mad Titan, alongside Drax the Destroyer, with Mike Friedrich co-writing the script. The issue's cultural footprint expanded enormously with the MCU — Thanos is the central villain of Avengers: Infinity War (2018) and Avengers: Endgame (2019, played by Josh Brolin, $2.8 billion worldwide box office), which drove sustained collector demand for the first appearance.

This is the issue where the spread between the raw eBay median and the certified value is most dramatic. Our estimator returns a blended median of €9 across 73 listings — but that figure pools all printings, conditions, and grades. A CGC 9.8 copy is worth approximately $9,000 on the 2024 market, and the documented all-time record is $13,025 (CGC 9.8 white pages with double cover, ComicLink, August 2013). That gap — roughly 1,000x between a raw low-grade copy and the certified peak — is precisely why serious collectors submit this issue without hesitation.

Understanding the grade spread on Iron Man #55

The CGC Census records approximately 40 copies at 9.8 (NM/MT) for Iron Man #55 — a remarkably low number for a title printed in the millions in 1973. Bronze Age newsstand comics were printed on low-quality paper and displayed on spinner racks; surviving copies in high grade are genuinely scarce. The 2024 grade ladder shows just how steep the drop-off is:

• CGC 9.8: ~$9,000
• CGC 9.6: ~$5,000
• CGC 9.4: ~$3,000
• CGC 9.0: ~$2,000
• CGC 8.0: ~$1,100

Each half-point of grade represents hundreds of dollars here. Submitting a copy that grades 8.0 or 8.5 can unlock $1,000 or more in value compared to a raw sale. Conversely, a copy with visible damage — stains, spine splits, rolled spine — gains little from certification. CGC grading fees range from roughly $30 to $85 depending on the service tier, plus shipping, so the economics only work when the copy is genuinely clean.

Silver Surfer #34 (1990): Thanos's modern-era comeback

After dying in Marvel Two-in-One Annual #2 (1977), Thanos returns in Silver Surfer #34 (October 1990), the opening chapter of Jim Starlin's new run on the title. That return triggers Thanos Quest #1–2 (1990) and leads directly into The Infinity Gauntlet (1991). Our estimator returns a median of €19 across 55 listings — solid volume. The higher median compared to Iron Man #55 reflects the better average condition of a 1990 newsstand book versus a 1973 one, not greater collector demand; high-grade CGC values for this issue are more modest. It is worth grading if your copy is in Near Mint condition.

The Infinity Gauntlet #1 (1991) and the modern keys

The Infinity Gauntlet #1 (July 1991, Jim Starlin / George Perez / Ron Lim) is the editorial climax of the Thanos saga. The six-issue mini-series brought Thanos to a mainstream audience and directly inspired the MCU's Infinity War storyline. Our estimator does not cover this series as a distinct title; CGC 9.8 copies circulate on eBay in the $200–400 range, with no Heritage Auctions record publicly documented. It is worth grading if you have a pristine copy, but does not justify premium grading fees on an average specimen.

Avengers #125 (July 1974) carries a median of €9 across 54 listings — an active mass-market, but no high-grade CGC record publicly documented. Worth grading only if the copy is in exceptional condition.