Buying or selling a business? Answer a few simple questions to create your own Business Purchase Agreement.A Business Purchase Agreement is a contract that transfers a business entity from its owner to a new buyer. A business sale agreement is a legal document that describes and records the price and other details when a business owner sells the business. The buyer needs to know what they are purchasing, and the seller needs to know what they are selling. When buying the assets of a business, some are subject to sales or use tax, while others are not. Items subject to retail sales tax. "Facilitate business acquisitions with our Letter of Intent template.