Dragon Quest 4-Panel Theater Volumes 1, 3, 4, 5 Set

This is the first volume, purchased new. Volumes 3-5 were purchased used from a bookstore.
The tanning on volume 5 is quite noticeable. Volume 1 is also slightly tanned. The other volumes have little tanning and are in good condition, but
there are some minor stains, so I have listed them as scratched and dirty. Please refrain from purchasing if you are concerned.
I believe volumes 2, 3, 4, and 5 are likely first editions. It is difficult to tell if volume 4 is a first edition based on the markings.

Dragon Quest
Dora-Q
4-Koma Manga Theater
Gangan Edition