An asset sale is the purchase of individual assets and liabilities, whereas a stock sale is the purchase of the owner's shares of a corporation. An asset purchase agreement (APA) is a written legal document that formalizes purchasing a business or substantial commercial asset.Asset Sale: Buyer Friendly. During an asset sale, the seller retains legal ownership of the business. In an asset sale, Company A transfers certain property to Company B in exchange for consideration (i.e. cash). Generally, a stock sale is better for the seller and an asset sale is better for the buyer. The main difference between asset sales vs. A stock sale involves the purchase of the entire business, including all assets and liabilities. This way, the buyer acquires ownership of the business. The seller of an incorporated business generally prefers to dispose of stock, while the buyer prefers to purchase the assets directly from the corporation.