Line 12a — Enter the amount of personal property items included in the sale price on Line 11. Do not include the value of a beneficial interest of a land trust."Streamline your personal property transactions with our General Bill of Sale Form. How to fill out the Illinois Personal Property Bill of Sale Document? 1. Enter seller's full name and contact information. 2. Please read the instructions before completing this form. How much does it cost to title and register my vehicle in Illinois? Purchase price is the value given for a motor vehicle and may be in the form of money, credit, property, or service. Reminder: Exemptions appear on your second installment tax bill issued in the summer. To learn more about how the property tax system works, click here.