There are many posts about selling ad position on the websites. Their price is not high. Generally, tens dollars for a header spot on a uv 100,000 site a month. But I want to know how many visitors can you get from your ads? In fact, I can only get 50 visitors for my ads on a site with 7,000 uv!
this is the wrong section for this topic. But... Its all down to what type of site it is. for example there would be no point advertising a movie blog on a blog thats unrelated. Your niche should match the site your advertising on. Also, you need to get some creative and captivating banners/flash banners made so people actually pay attention to the adverts and click them. If its a webmaster topic for example, seo, web design etc then there's no real chance of getting good traffic from adverts as web masters, designers, developers etc never click adverts, its just a social engineering thing I guess.