Combining the traffic of the 4 sites generates 140,000 uniques/month and over 1,000,000 pages views.
Im am offering only 8 spots and your banner will be displayed randomly on all 4 sites.
Banners will be placed at the top to the pages, either next the the site banner or right below it. (728x90 or 468x60 banners sizes are available)
Im using a simple banner script, so it only provides views and clicks, but does not provide any sales information.
The price is based on length of time and is $100/month. This works out to be about 125,000 imp each which equals about $.85 CPM. This is extremely cheap and this is of course if all 8 spots are taken. Impressions will be much much higher if all spots are not filled.
PM if you are interested. I can do weeks or multiple months at a discount if your interested.