Internal Sale Input Form should be completed. TIMING: The department purchasing the asset should complete the Internal Sale.When we're talking about the gain or loss of the sale of an asset we need to be looking at net book value at the time of the sale. New transfer from fixed asset account to bank account, the amount is equal to your sale price. 2. Find answers to the a list of common questions other users have asked. You can filter the results to a particular category or properties and services. Business Personal Property Manual. Valuation of Business Personal Property. Asset disposal is the removal of a long-term asset from the company's accounting records. It is an important concept because capital assets.