Help how much should i charge ?
 

Help how much should i charge ?

I run a network of amateur blogs which bring in about 10k unique's daily Organic SEO traffic from google, aol, yahoo and some smaller search engines.

The blogs layout is the same on all the blogs.. banner on top,side,bottom i had a few offers to buy spots on my network

how much should i charge when a sponsor is asking me to put only his banners top,side,bottom for 30 days?

take the money you make from those spots and double that and thats what you charge ;)