Wow, is that next to impossible to answer. We'd have to know your niche, the value of products that can be sold, etc. Have you proven your blog to be able to produce sales? How much is your CTR to a product you promote? How much is the conversion if they click through? All of those types of questions are going to determine the value of the link, not just the fact that there are 100 unique visitors. In other words, the value of a reader on a blog about Home Foreclosures, is going to be worth a lot more than a reader on a blog for Paper Airplanes. - Barry Unruh

Sales are OK, 10%CTR, $50-$500 product range. It's a good niche I guess ;) - Jorge Blanco

Links are sold based on PR mostly. Thats the main criterion for link sales sites like Teliad, linkworth, text-link-ads etc. - TrafficBug

The higher the PR, the higher the link price per month - TrafficBug

how about on pages with pr 1, 2 n 3? - Jorge Blanco

Depends on your niche AND the PR. To get an idea, get a free account at sites like Teliad where you can see the PR for your niche sites and what they are charging at the moment - TrafficBug

As much as they'll give you! ;) Question - what is the difference between a paid link and an ad? I was watching some Google guy over on YouTube and he mentioned paid links will get you banned. What's the difference? I'm assuming that's ads are obviously ads and paid links are presented more just as hey this is a cool site sorta thing? - DaleK

Paid links are links to your site you paid for, made to look as original links. But yes, the difference between ads and paid links is fuzzy. I'm guessing it's meant for those who use such services, not the links themselves. (if that makes any sense) - Jorge Blanco