Secure your San Antonio small business's transactions today! Our asset purchase agreements from Dan Burke are created to account for all of your assets.Buying or selling company assets? Use this Asset Purchase Agreement to finalize the terms of the transaction. An Asset Purchase Agreement is a legally binding contract between a buyer and a seller that details the terms and conditions of the sale of a business's assets. Agreement to Sell and Purchase. An asset purchase agreement (or APA) is a binding document between a buyer and seller for the purchase and sale of a company's assets. An APA, or Asset Purchase Agreement, is a contract in which a buyer and seller agree to the transfer of ownership for an asset at an agreed price.