Installment buyer or "buyer" means a person that buys, hires, or leases a motor vehicle for personal, family, or household use, and not for commercial, business, or agricultural use, under an installment sale contract or a legal successor in interest to that person.
Installment sale contract or "contract" means an agreement for the retail sale of a motor vehicle, or that has a similar purpose or effect, under which part or all of the price is payable in 2 or more scheduled payments subsequent to the making of the agreement or under which the obligor undertakes to make 2 or more scheduled payments or deposits that can be used to pay part or all of the purchase price, whether or not the seller has retained a security interest in the motor vehicle or has taken collateral security for the buyer's obligation, and any extension, deferment, renewal, or other revision of that agreement. The terms include a loan, mortgage, conditional sale contract, purchase-money chattel mortgage, hire-purchase agreement, or