Which DC comic books are consistently considered among the most valuable?

Some of the most valuable DC comic books include early issues of *Detective Comics*, *Action Comics*, and *Batman*. Specifically, the first appearance of Superman in *Action Comics #1* (graded high) and the first appearance of Batman in *Detective Comics #27* are consistently sought after and command extremely high prices. Other key issues include early Silver Age *Green Lantern* and *Wonder Woman* comics.