How much would you pay for a guest post?

Guest posting is a pretty awesome way of getting baclinks. You can get incontent links from various well established websites..

So, Lets say I am good at writing health articles which get accepted at quality sites..
EG:http://www.bloggingpro.com/archives/2010/09/17/10-ways-blogging-is-like-dental-hygiene/

What would you pay me for each article.. Approximately?

I am wondering what value does guest posting holds for the avg. webmaster..

If you're interested in doing the entire service, writing, contacting webmasters, etc., I'd be willing to pay. I'm not sure how much. PM me if you're actually wanting to do this.