I run a programming site and was contacted by a big product company. They want to publish 8 product posts about their product (they will write) in the next 6 months and purchase 5 million impressions of a 125x125 ad above fold. The product relates to the programming articles i write. I am not sure what to charge them per post and for the 125x125 ad. I do not run google ads. Something about my site: Visitors: 320K p.m with majority from US, Canada, Europe and India. Regular content. 11K Rss readers. Google PR: 5 Alexa - 30K Can anyone help me how to go about this?