High PR page or high PR website is considered as a quality backlink?

Sites don't have Page Rank, only "Pages" have Page Rank.

So, if your link is not on the "page" with the Page Rank. It's worth much in terms of you getting any Page Rank for your "pages" from it.

For me , i think high PR and page authority is most important to get a high backlink.

homepage links are mostly paid. so commenting on pages with high pr is good practice but dont use keyword , use your real name.

Most Important High DA, PR and industry based Get Quality Backlinks

I think he is a little bit confuse with the PR. If a site has good PR so that its pages will have. And for me appearing on the first page is not that important. You can link anywhere, If you can.

yes, you should post your link in the page where the PR is higher

I'm going to back up Kevin here ... pages have PR, not sites.

I see people they suggest us sites where we can get high quality backlinks. As example blogger, problogger, blogspot, wordpress and so on etc... But the think that was confusing me, yes it's right that when you go to the home page of these sites, they have a very high PR but unfortunately you can't leave your backlinks there. You go search for posts and comment to leave your backlink. Then the PR of this page is not high. It's between unranked and PR3. Or by time it gets higher but your comment goes too back due to new comments and it's seen at last pages where again it's PR is very low. And I was considering if the website is high quality then this backlink can be considered as high quality which could benefit me.

So I wanted to know exactly by asking this question and to get an answer to clear my mind where I've got it.

Thank you Kevin for your answers that have cleared the question marks out of my mind. And thanks to all others where you have agreed with Kevin that have stated it's the right answer.