Hello,
I am professional on bookmarking since I have completed the long term full course on it. In my google drive there a full list of bookmarking sites. There the sites are devidete high PA and DA based. If client want to do high PA or DA then it will cost some bigger than low PA or Da. Many hard work I have spend for those sites to understand how to work it and when flop it.
If you need some prof I will provide you my google sheets link and then you can see my work and I hope so you will trust me.
Thank you
Tanvir Anjum Tanim