It is hard to make a living but these sites give advice.
https://www.bleedingcool.com/2015/07/22/comic-book-owners-explain-how-to-start-a-comics-retail-store-at-sdcc-15/
http://boards.straightdope.com/sdmb/showthread.php?t=288952
The handbook is at the Comic Book Shop run by Ned Noodlehead.Go to the comic book store. Ned Noodlehead will give you the Handbook.
At a comic book shop that sells back issues.
comic corner and the mind shop
You can try outside a library , book store , your own website , Amazon.com , eBay or comic book shop .
The comic shop is the closest store to the County Prison on Super Power Island, the leftmost store on Main Street. It is run by nerdy Ned Noodlehead.
It means that that particular issue was sent only to a comic book specialty shop and was not distributed to general outlets .
The Superhero Handbook is at the Comic Book Shop run by Ned Noodlehead. But what you need more is the Superhero ID card from the Masks and Capes costume store.
There is one comic book shop in Porterville located at 700 W. Olive next to olympic gym.
The value of the comic books would depend upon whether you have any comics of value to a comic book shop. Refer to the Overstreet Comic Book Price Guide to assess the value of your collection.
The island's Klassic Komix shop is on Main Street.
Try selling them at a local comic book shop , a flea market , the newspaper or through www.craigslist.org
One can purchase Topolino comic online on sites such as eBay, Valore Books, and My Comic Shop. One can also purchase them at their local comic book store.