DETECTIVE COMICS #364

Cover shows good color gloss with vibrant pink and purple fields, though there is some minor edge wear along the top and right border and slight corner softness at the top corners. A faint diagonal crease/handling line is visible near the upper left spine area, and the spine itself appears tight with only minor stress. The book is currently housed in a plastic sleeve, which limits full assessment of surface sheen; interior pages and back cover were not visible for review.

Detective Comics #364 arrived in May 1967, deep in the run most associated with Carmine Infantino's redesign of the Dynamic Duo's visual identity following the 1964 "New Look" overhaul. Like most issues from this stretch, it delivers a self-contained Batman and Robin mystery rather than any origin, first appearance, or landmark creative event, and it has not been singled out by standard price guides as a key issue. Its interest lies chiefly in being a representative, collectible example of the Infantino-era Batman aesthetic that defined the character in comics and, indirectly, informed the tone of the concurrent live-action television series.

The certified population is substantial for a book of this vintage, with 129 Universal copies recorded across the CGC census, and sales activity is fairly steady through the middle grades (6.0 through 9.4) with only a single 9.8 known and no recorded sale at that grade. Pricing across low and mid grades is compressed and stable, reflecting a book bought primarily by run-builders and Silver Age Batman completists rather than speculators. The market shows the expected non-linear jump above 9.0, with values climbing sharply from the low hundreds at 9.2 to several hundred dollars at 9.6, underscoring how scarce true high-grade survivors are relative to the raw supply.

This issue collects best as part of a broader Detective Comics or Batman Silver Age run rather than as a standalone target, and demand is driven by condition-conscious collectors completing the Infantino years rather than by first-appearance or crossover interest. Raw copies in low and mid grade trade in the modest, workmanlike range typical of non-key back issues from this period, while a Universal 9.8 — currently absent from the census — would command a substantial premium simply by virtue of being the finest known example rather than any inherent story significance.