mortgage, loan, insurance, etc pay up to $50 per click. Click rate is based on quality of you're site!
At one point, I was averaging $20-30 per click for some of my domains 2 year ago. Now a days a lot of cheating is going on with click rates...
you should focus on developing sites with affiliate links.. i average $5-20 a sale. Compared to adsense 6 cents!