I had someone approach me to pay me monthly to insert a link into the content of one PR2 post on a PR3 blog. I know it is better practice to nofollow outgoing links.
But if they really wanted a dofollow, would it harm me if they were a PR5 in a niche that is relevant to the content on that page and they were quite strong, backlinks and authority wise? The page they want me to link to is a PR4 itself. They have a ton of high quality backlinks themselves.
Would it be typical to price the link differently based on nofollow or dofollow?