In 1968, Gold Key published a 60+ page Yellow Submarine comic book for the princely sum of 35 cents. Never reprinted, back issues - if you can find one - start at around $300.
What's most interesting about the comic is that its creators (writer Paul S. Newman and artist José Delbo) had to produce it without a finished script. So the story within the comic is quite different from the story in the movie. The artwork is impressive however - very much in keeping with the style of the film.
I've always wanted to see this Yellow Submarine comic. I'm not a collector - I'd be perfectly happy reading a good reprint. Lo and behold, a blog called Cartoon SNAP has made my dreams come true. You can read it here online (in some confounding tiny-window format) or download the whole thing as a PDF.
