How about 20 dollars a month for a spot on a rotating banner? I think 15 or 20 ads are too much for a site. But an advertizer would be more likely to click on a rotating banner with 15 or 20 ads. Does anyone agree or disagree? My stats for ONE WEEK: Visitors: http://www.koj.50g.com/free-music-study-dot-com-stats.jpg Nations Stats: http://www.koj.50g.com/free-music-study-dot-com-nation-stats.jpg Note: This really isn't an ad. The stats are just to help answer the question. I know this isn't the forum for ads.
I think there is no fixed number of banners in the rotation which can be called ideal. It depends on the number of your visitors. As I have seen in your stats, you get about 1,200 uniques/month. With such numbers would be difficult to sell even only one banner without rotation. Since you cannot expect big money with this traffic, I would rather place some PPC or affiliate banner on your website and time which you plan to invest in trying to sell your advertising space recommend to spend by promoting your website.
Those stats were for one week not one month. I'll have to redo my stat pages. People are getting the wrong idea.
I guess not a bad deal for your site.. but $10-$15 is a good price.. I guess $20 may not attract more customer..