I have recently be approached by a company that provides internet marketing services asking whether we are taking advertising on our site. We already have adsense in place, which earns us up to $1 a day, so a boost to that would of course be welcome.
The only thing is I'm not sure what kind of value to put on having a specific advert on my site! The homepage is PR4 and subpages have PR0-3 depending on how deep into the site they are. We also receive around 70 visitors per day according to google analytics, all through organic links from search engines.
Is there a tool that will help me value advert space on my site or is there anyone who can put a figure on what they think I should request based on the above?