How to interpret quality of computer science journals that charge publication fees? - Academia Stack Exchange

"I usually publish my research work at conferences in the field of Computer Science, I do not have so many papers and the question that I am doing here it might sound foolish for some (or maybe a lot) of researchers in different fields. A situation has arosen when a colleague of me wants to publish a co-join work that we have done in a CS journal. For my experience conferences charge a fee for authors when their work is accepted, but I have some doubts about the fees that I found for some journals in the field ..."