GREEN LANTERN #30

The cover shows moderate wear typical of a Silver Age book: some rounding and light wear at the corners, minor edge wear along the top and right border, and a faint vertical crease visible near the spine area. Colors remain bright with good gloss retained, and there is no major staining or tears visible. The book is protected in a plastic sleeve; interior pages and back cover were not assessed.

Green Lantern #30, cover-dated July 1964, is a middle-run entry in DC's Silver Age Hal Jordan series written by John Broome with art by Gil Kane and inks by Joe Giella. The issue is chiefly notable to specialists as the first appearance of Sonar (Bito Wladon), a sound-based supervillain who recurred across Green Lantern and later Justice League stories and, through subsequent continuity, was established as the father of the Teen Titans character Jericho. It is not a headline Silver Age key on the order of first Sinestro or first Star Sapphire appearances, but it holds a documented place in Green Lantern rogues-gallery history.

Market data shows a typical Silver Age demand curve for a well-collected but non-blockbuster title: mid and low grades trade in a tight band under $100, reflecting steady completist demand for the Broome/Kane Green Lantern run, while values escalate sharply above 9.0 as census population thins. The jump from roughly $500 at 9.4 to $1,450 at 9.6 illustrates the premium high-grade Silver Age copies command even for secondary keys, driven by a combination of Gil Kane cover appeal and the character first-appearance angle rather than broad crossover recognition.

This issue suits Green Lantern rogues-gallery completists, Silver Age DC villain specialists, and investors targeting under-the-radar first appearances with modest but real upside. Low and mid-grade raw copies remain accessible entry points for readers and set-builders, while the handful of top-census slabs are positioned for a smaller pool of high-grade Silver Age buyers; with only a single 9.8 recorded and no sale on file, that copy would likely set a new benchmark price if it reached auction.