I looked throw the internet and funded different worth for the same web portal . Difference was so big even 500 % so I ask what is the best and most accursed way to find out how much is this site worth ?

mobile.net.hr

It would be wise to consult a professional consultant however if you go to Worth Of Web - Website Value Calculator you will find net.hr worth about $66 million.

This site may not be accurate. But here's what I have found...

Facebook.com according to Forbes is worth $73.9 billion in February.
Facebook.com according to worthofweb.com currently is worth $78.7 billion currently.