It is unlawful for any person other than an automobile dealer or automobile distributor who accepts either directly or indirectly any subsidy or the benefit resulting from any discrimination made unlawful by this chapter or contracts either directly or indirectly to accept any such subsidy or benefit to finance or attempt to finance the purchase or sale of any motor vehicle or buy or attempt to buy any conditional sales contracts, chattel mortgages or leases on motor vehicles sold at retail in this State thereafter.