Sell Agreement (BSA) is a lifetime contract providing for the transfer of a business interest upon the occurrence of one or more triggering events. In this guide, we will explain what buying out a business partner means, how to prepare to buy out a business partner, and more.If you are hoping to force your business partner to buy you out, the best thing you can do is carefully read through your operating agreement. A buyout agreement is a binding contract between business partners that establishes the buyout details of one partner exiting the partnership.