Identify the parties involved in the transaction. 2. A business purchase agreement marks the official start to the sale of a business.Read our blog to better understand each part of this important document. Complete your Purchase Agreement in minutes with SignSimpli. I'm gonna break down all the terms and conditions so you can understand what it means and we're gonna fill that out so you can have a real-life example of it. The easiest way to create a Business Purchase Agreement is to use a template that is customized to your state. When it comes to filling out a real estate purchase agreement, several key players are involved: buyers, sellers, real estate agents, and attorneys. Learn what a business purchase agreement looks like and how to draft one effectively.