The phrase refers to collectible sequential art publications possessing significant monetary value due to factors such as rarity, condition, historical significance, and demand. As an example, an original copy of Action Comics #1, featuring the first appearance of Superman, can fetch millions of dollars at auction, highlighting the potential worth some publications can attain.
The potential appreciation in value offers financial opportunities for collectors and investors. Furthermore, such publications offer tangible connections to popular culture history, representing significant artistic and social trends. Their preservation and study contribute to understanding the evolution of visual storytelling and its impact on society.