Below is a general due diligence checklist with the first 8 of 16 items to cover your bases in a business or asset purchase transaction. It requires all purchasers to secure from sellers bulk sale clearance certificates.For further assistance, please call (717) 783-6052. Documents. If you are thinking about purchasing a business from someone, you should be aware of Pennsylvania's Bulk Sale Law. In an asset purchase, only the assets of the business are purchased, not the liabilities. Browse over 1500 Business Assets currently available for sale on BizBuySell. We manage 15 different local liquidation marketplaces in Philadelphia PA to help you sell assets in all categories and value levels.