MARVEL TWO-IN-ONE #31

Cover shows strong gloss and bright, unfaded colors with sharp corners. There is visible vertical wave/wrinkling in the cover stock (light non-color-breaking creasing) running through the center of the image, likely from handling or storage under plastic. Spine appears mostly tight with no major stress lines visible, and edges look clean without chips. Interior and back cover were not assessed, so grade is based solely on this front cover photo.

Marvel Two-In-One #31 (September 1977) pairs Ben Grimm with the newly introduced Spider-Woman in a story scripted by Marv Wolfman, with art by regular series penciler Ron Wilson and inker Sam Grainger. The issue arrives during Spider-Woman's earliest published appearances, shortly after her debut, placing it within the wave of guest-star team-ups that Marvel used throughout the 1970s to build interest in newer characters via established headliners. The Supreme Hydra villain and supporting cast members Alicia Masters, Chauncy, and Trevor round out a fairly typical mid-run Bronze Age Two-In-One plot.

Market data reflects a book with a large certified population (61 Universal copies on census) and a demand curve concentrated almost entirely at the top of the grading scale. Nearly all recorded sales activity clusters at 9.6 and 9.8, with essentially no market documentation below 9.2, a pattern typical of a long-tail Bronze Age title where lower-grade copies trade quietly outside auction tracking. The pronounced value jump between 9.6 and 9.8 signals that collectors chasing this issue are pursuing census-topping condition rather than the story or character content itself.

This is a book for series completists and Spider-Woman early-appearance collectors building out her pre-solo-series guest spots, rather than a marquee key. Raw copies in lower and mid grades move steadily but modestly as filler for Two-In-One or Thing runs, while top-census 9.8 slabs command a real premium driven by scarcity of pristine newsstand survivors rather than by first-appearance status or landmark creative work.