It's easy. I need some high quality links on pages that actually have a PR of 6 or above. Not the domain - the page.
No more than 20 links per page.
The links should be permanent, with at least a one year guarantee.
Give me your price per link. Obviously, I will have to authenticate their existence, so the page where they exist after they are posted. I will check the links every thirty days to ensure they are there.