To form a valid contract, the parties must exchange valuable consideration. Consideration can be money, services, covenants and other things of value.You couldn't actually get paid to be a real estate broker, a real estate agent in a transaction unless you have a written agency agreement. The easiest way to create a Business Purchase Agreement is to use a template that is customized to your state. Chapter 10 Part 2 Sales Contract Practices, Handling Offers, Options, Installment Contracts. Money for a buy-sell agreement can be set aside, as long as it is easily accessible. Com to register for classes! Identify the parties involved in the transaction. 2. A contract is whatever the two parties agree to it. There is no such thing as standard contract in the sense that you have to use this.