FANTASTIC FOUR #129

Cover shows strong gloss and bright color with sharp corners and no visible creases or tears. Slight wear is visible at the top edge and a faint bend at the upper right corner; spine appears mostly tight with no obvious stress lines visible in this photo. The book is in a protective sleeve, which limits full assessment of surface sheen and edges; interior and back cover were not assessed.

Fantastic Four #129 (December 1973) introduces Thundra, a formidable warrior from a matriarchal alternate future who arrives on Earth seeking to prove her superiority over Ben Grimm, the Thing. Scripted during Marvel's Bronze Age expansion of the FF's rogues' gallery and supporting cast, the issue features a cover and interior art by John Buscema, inked by Joe Sinnott, representing a high point of the classic Buscema/Sinnott collaboration on the title. Thundra's debut positioned her as a recurring foil and eventual ally within the Marvel Universe, appearing in later FF storylines, the Thunderbolts, and modern crossover events, which sustains her relevance among characters cataloged as significant Bronze Age additions.

Market data shows a typical Bronze Age key curve: raw and low-grade copies trade for modest sums reflecting high surviving census numbers across mid grades, while values climb sharply at the top end. The CGC 9.8 population remains thin relative to the overall census of over 400 graded copies, and recent 90-day and 30-day average sales near $1,090 outpace the trailing 1-year average, suggesting renewed collector interest in top-graded examples. Demand is driven primarily by character-specific collectors tracking Thundra's first appearance alongside broader Bronze Age Marvel key-issue buyers rounding out FF runs.

This book suits collectors building character-first-appearance sets, FF run completists, and Bronze Age specialists rather than generalist speculators. Mid-grade raw copies remain widely available and affordably priced, making the issue accessible for readers and lower-budget collectors, while pristine 9.8 slabs command a substantial premium and trade infrequently, appealing to condition-sensitive investors and registry set builders. The wide gap between raw and gem-mint pricing reflects a steep, well-documented grade curve rather than broad-based speculative demand.