545.07 Acceptance of benefits by finance company for purpose of lessening competition prohibited.—It is unlawful for any finance company who accepts or receives, either directly or indirectly, any payment, thing, or service of value, as set forth in s. 545.06, or contracts, either directly or indirectly, to receive any such payment or thing or service of value, to thereafter 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 other paper on motor vehicles sold at retail in this state.