I have a website that is currently sitting at 8th On Google for a 1,200 monthly search hosting related keyword that Adwords cpc is around $7. I estimate that it will be reaching 1st spot very soon. Currently I'm not mentioning any companies on my article and my idea is to reach out for some companies on my niche and offer them to display a banner on my website or something like that when my website reach first spot. My question is: How much should I ask per month? How should I come up with a price?