For example, I use different google search operators

I check Website authority

I check

Backlinks: If website looks suspicious i check more detail in backlink profile.

I check if website has some strong backlinks from other websites with bigger authority.

Organic traffic: The website must have Organic traffic to look real

Outreach editors

I have a website https://www.ourhairstyle.com/write-for-us/

So I usually get a 3-5 /week outreach offer from other editors.

So I understand how person psychology works, how to get a better price.