JOHN CARTER, WARLORD OF MARS #13

Cover shows strong gloss and vibrant color with sharp corners and clean edges; no visible creases, tears, or color breaks. Spine appears tight with only the faintest hint of stress at the top edge. A UPC barcode box is present, confirming newsstand distribution. Interior pages and back cover were not assessed, and the book is currently in a protective sleeve which may obscure minor surface flaws.

John Carter, Warlord of Mars #13 continues Marvel's late-1970s adaptation of Edgar Rice Burroughs' Barsoom novels, with Marv Wolfman scripting and Carmine Infantino providing pencils over Rudy Nebres' inks. The issue features the series' established cast of John Carter, Dejah Thoris, Tars Tarkas, Sola, and Kantos Kan, continuing the sword-and-planet storyline that ran through the license's short Marvel tenure. No first appearances, deaths, or landmark creative milestones occur in this issue; it functions as a mid-run chapter in a licensed adaptation rather than a stand-alone event book.

Market activity for the issue is thin and concentrated almost entirely at the top of the census. GoCollect data shows a functioning market only from grade 9.0 upward, with the bulk of recorded sales clustering at 9.8, where the FMV holds steady near $110 across the past year. Lower and mid-grade raw copies see little recorded transactional data, reflecting the low overall demand typical of secondary Barsoom-license issues rather than any scarcity — census figures show a healthy 32 universal copies already graded, suggesting supply is not a constraint on price.

This is a book for John Carter or Infantino/Wolfman completists rather than speculative buyers. Entry-level and mid-grade copies remain inexpensive and are readily available in the back-issue market, while pristine 9.8 slabs command a real premium driven by a small pool of high-grade-focused collectors chasing census-top copies. The gap between raw and top-slab pricing is wide and likely to persist, since demand for this title is narrow and grade-sensitive rather than broad-based.