Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer. Enter into a Purchase Agreement.Once the seller and purchaser agree on the terms of the sale, a purchase agreement will be executed. (i) A signed Asset Purchase Agreement. In an asset sale, the new owner purchases the business's physical assets. The seller retains all rights to the legal entity. A contract for deed involves the seller financing the property purchase as an alternative to conventional mortgages, benefiting both parties.