thank you Dr. Derek Pyne for your useful opinion, most real scientific journals do not rely on the fees in publication, especially E- journals, and perhaps this criterion is the real fact that the journal depends credibility in the evaluation of research and acceptance for publication ..

regards,

I have many peer-reviewed journal publications, but I never publish in paid journals. Some fields may have a greater expectation of author payments than others, but in my experience journals requiring huge author payments are not prestigious and are of suspect quality.

thank you Dr. Micheal Marek for your useful opinion.

Regards,

Good points. I gained one or two things.