OK, hypothetical question... Mini website, 10+ pages, PR0 but it will have links constantly built to it. Do you think anyone would be interested in renting front page (post their article with a few links) for $1.5 a month? I know you can buy PR links for a few $ but usually you have to share home page with xx other links and after a day or two they are pushed to PR0 archive anyway. Here frontage is all yours (except for one other link - mine) Is it worth $1.5
other than PR, people might consider on the traffic and your content as well $1.5 per month is reasonable if your website is good
if you have the traffic to it, then it might gain something around that, but it'd have to be sitewide rather than just the front page. obviously, as you gain PR, and better traffic, then you can sell the links for more, but the thing to remember about new and low pr sites, is that you can't expect the earth for links.