Here is a lot of the first 4 volumes of Chainsaw Man by Tatsuki Fujimoto released by Viz Media.

You will get:

Vol. 1 - Dog and Chainsaw

Vol. 2 - Chainsaw vs. Bat

Vol. 3 - Kill Denji

Vol. 4 - The Gun is Mightier

All books are in great condition (please see pictures for details).