A few years ago I fell into the trap of building a website for high CPC keywords. Problem one
it was super hard to get natural traffic from search engines (lots of competition) and I didn't know as much back then about link building as I do now. problem two
is that when I finally got clicks they were still under $1 each, so I just gave up and the site has been sitting making me about $20 a month.
Recently I decided to check the adsense and I noticed I made more than usual. I remembered that I installed adsense / analytics combo so I could see what pages were making me $$$ via adsense, I found this gem! edit* -
changed the pic to follow adsense TOS
$10.30 for one single click! NICE, I didn't think they existed until this very day