This book lists a lot of them: https://www.amazon.com/Secrets-Power-Negotiating-15th-Anniversary-ebook/dp/B07JMQBZKH/ref=sr_1_1?dchild=1&keywords=secrets+of+pow

This book lists a lot of them: https://www.amazon.com/Secrets-Power-Negotiating-15th-Anniversary-ebook/dp/B07JMQBZKH/ref=sr_1_1?dchild=1&keywords=secrets+of+power+negotiating&qid=1588403021&sr=8-1 https://www.amazon.com/Secrets-Power-Negotiating-15th-Annive... I encourage every entrepeneur to read this, because you'll see them time-and-time again. Most of the tactics are used to "get what you want", as they say, but also making the other side convinved they "won". Where they presumably come back and do it again to you. It relies on cheap psychological tactics. As a business-owner, 100% of the salesmen I dealt with used these same tactics. Identifying the tactic and calling it out usually neutralizes the tactic with the salesmen. But as an arbitrary example, anchoring numbers. They'll show you an insanely expensive first solution. And then later lead you to a merely overpriced-solution. But the second ones seems "cheap" because they are judging it from perspective of the first price solution.