A Social Network for Women in Business, Women Entrepreneurs, and Bloggers
I'm suppose to seel Ad space using my media kit but I never got around to making one so I just pitch directly to companies. To figrue out what to charge you need to learn what other sites in your niche area is offering. I've seen prices range from $20 month to $75month for 125x125 space.
If your working with another person to to sell their products then you could work out a deal. A lower ad rate for a percentage of sales since they're gaining customers using your site readers. Just a thought. Hope that helped somewhat