The complete edition of Violence Jack, I think, is the best and most complete version of the comic you'll find. Surely, that's why it's called that. Volume one of this edition is made up of around two-and-a-half of the original volumes, so you get a lot of Jack for your buck. Nearly 500 pages gives this book a very satisfying thickness to hold. The art on the inside looks fine and crisp... and just look at that cover art! So cool! This is a 1998 edition of the 1973 comic, so your's is likely to be in great condition like mine.
This is one of my favorite comics ever, and favorite works of fiction at that. This is basically the original post-apocalyptic manga, even pre-dating Fist of the North Star by 10 years! I highly recommend Violence Jack to those who can read Japanese, it's a fantastic read. But be warned, this series is by no means for children! 18+ please!