JOHN CARTER, WARLORD OF MARS #6

Cover shows strong gloss and vibrant colors with sharp corners and no visible creases or color breaks. There is minor edge wear at the top corners and a faint bend at the bottom right corner. The book is in a protective sleeve, which slightly obscures fine surface detail; interior and back cover were not assessed.

John Carter, Warlord of Mars #6 continues Marvel's licensed adaptation of Edgar Rice Burroughs' Barsoom novels, with Marv Wolfman scripting and Gil Kane supplying both pencils and cover art. The series translated Burroughs' interplanetary swordplay into Marvel's house style during a period when the publisher was expanding into licensed properties and pulp-adventure revivals, and this issue features John Carter alongside supporting Barsoom figures Tars Tarkas, Kantos Kan, and Mors Kajak. It holds no first-appearance or landmark-creator distinction within the run and is not cited in price guides as a notable cover or story issue.

Market activity is thin, consistent with a mid-run issue in a niche licensed title rather than a flagship Marvel book. Certified sales cluster at the low end of the grading scale, with modest but real premiums appearing only in the higher grades (9.4 and 9.6), and no meaningful sales record above that. Demand is driven almost entirely by Burroughs/Barsoom completists and Gil Kane art collectors rather than broad key-issue speculation, keeping raw-copy trading quiet and largely condition-driven.

This is a book that moves in small increments: low-grade raw copies serve as reading/filler material for run-builders, mid-grade raw copies appeal to Kane pencil enthusiasts assembling the series, and high-grade certified copies draw a narrow but persistent pool of Barsoom specialists and Bronze Age Marvel grade-chasers. Absent a recognized key attribute, price appreciation will track general Bronze Age market strength and Kane's growing stature rather than any issue-specific catalyst.