If you are thinking about purchasing a business from someone, you should be aware of Pennsylvania's Bulk Sale Law. Our free online guide for business owners covers Pennsylvania sales tax registration, collecting, filing, due dates, nexus obligations, and more.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. A guide for businesses needing straightforward answers to Pennsylvania Sales and Use Tax questions and audit guidance.