Plan for the Future of Your Business Today. Fill out the contact form or call us at (312) 889-8702 to schedule your free consultation.Complete all information and attach a copy of the sales contract. This contract sets out the key terms of the transaction, including the purchase price, payment terms, and the assets and liabilities included in the sale. A Business Purchase Agreement is a legally binding contract between a buyer and a seller for the purchase and sale of a business entity.