Left: This poster from The Bride of Frankenstein (1935), believed to be the only remaining one of its kind, has been valued at $700,000. Right: Posters for King Kong (1933) are among the most coveted.

Left: This poster from The Bride of Frankenstein (1935), believed to be the only remaining one of its kind, has been valued at $700,000. Right: Posters for King Kong (1933) are among the most coveted.