An Illinois motor vehicle bill of sale documents the purchase and sale of a motor vehicle between a private seller and buyer in the State of Illinois. Prepare a bill of sale for the buyer.Include the date of sale and the price paid. The Electronic Registration and Title (ERT) System allows you to complete and print an Application for Vehicle Transaction(s) (VSD 190). This form may be used in lieu of a bill of sale if the department is questioning the purchase price. The form details the sale date, purchase price, and the names and addresses of the parties involved.