I have an email course (autoresponder) -> course sales funnel setup for Double Your Freelancing Rate which nets about $1-1.5k a day in sales, mostly on autopilot. This is by far the most successful funnel I've created for any of my products, and is performing really stinkin' well.
Product: http://doubleyourfreelancing.com/rate/
Email course: http://doubleyourfreelancing.com/free-pricing-course/