Introduction to Negotiation: A Strategic Playbook for Becoming a Principled and Persuasive Negotiator from Yale University. https://www.coursera.org/learn/negotiation

I recently started taking this class and have found it very interesting so far. I thought maybe other people would be interested in it as well. Coursera is an amazing resource for getting a free, quality education in many different fields. They also have some other classes that relate to real estate investing.