This is a kind of car rental plan in which the buyer rents the vehicle with the option to buy it later. These are two vehicle purchase contracts. The complete and immediate sale of the vehicle in question may also be included in the vehicle contract. PandaTip: It is not normal to include a guarantee in a private sale, but if the seller wishes, you can change this clause if necessary. One proposal could be as follows: „The vehicle is sold with a guarantee of fitness to drive and continuous safe operation for a period of XXX months and all deficiencies found during this period will be corrected at the seller`s expense, excluding only defects caused by the buyer.“ As an incentive, merchants usually offer free items or services to the buyer.