The highest paid skill you can learn. Jack Miller's NEGOTIATIONS manual, you'll learn new ways to negotiate so everyone feels like they WON.  You'll get specific things to say, or not say, when talking to sellers, and you'll learn little tricks for getting the BEST DEAL possible.  This 200+ page manual is full of the best techniques and strategies to learn how to become a pro-negotiator.... without the seller even realizing you were negotiating.