A retail installment sale is a transaction between you and a dealer to purchase a vehicle where, you agree to pay the dealer over time. Note: A motor vehicle sold to any organization for use in the operation or carrying on of a trade or business is taxable.This booklet defines the Rule's requirements, explains how to prepare and display the Buyers Guide, and offers a compliance checklist. 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. Typically the dealer will have you sign a paper that turns the actual rebate over to them, then they will credit you on the sale. Ford said it had reached an agreement to sell the lighting business and its Sandusky, Ohio, plant to privately held Meridian Automotive Systems.