I have a few targeted sites, some of which easily get 500k impressions. My question is: what is the average bid on the 1,000 impression CPM? I haven't gotten any, and I up and up my bid. I'm trying to get at $3.50 because 1,000 impressions isn't worth much Anyone else used CPM? What's the LEAST you've paid for it. And the AVERAGE. Please and thank you.
It all depends on the market/site you're targeting. No one outside of Google would be able to tell you the average CPM of all he sites in the Google content network. I've seen groups of sites that average under $1, and other groups that average over $10. See https://adwords.google.com/support/bin/answer.py?answer=18280 for more info on how CPM bids compete with CPC bids for placement.