There are a few reasons why I would strongly urge cash compensation. One reason is the complications set forth in prior posts of trying to split a car. It's siimply not practical. When there is both a buyer agent and seller agent from different brokerages in a transaction, the compensation must be divided between 4 parties. The two brokerage companies and the two agents. An automobile, nor vacation, cannot be easily divided. The brokerage firms are responsible for issuing 1099s to the agents. The auto would have to be sold, and the cash would have to be divided.......or one party would keep the car and have to pay the other parties. For you, as a seller, anything that is time consuming and complicated is counterproductive to your goal. You want agents to be excited about selling and promoting your property. The best way to do that is to have a marketable product (clean, clutter free, priced well, and easily accessible) and a competitive compensation (commission.)
A non-cash perk as an add-on can sometimes function as an incentive, but generally is less effective than cash.
Most Relators are independent contractors who must pay their overhead bsuiness expenses plus be able to generate an income to pay thier mortgage, car, utility, food and other living expenses. There is a common misconception that Realors make a substantially greater income than the average Realtor does in reality.
When a salaried sales staff working for a corporation is offered a contest and a chance to win a car or vacation for high achievements, it is in addition to compensation, not in lieu of compensation. Non-cash perks become attractive as add-ons, not as substitutes.
I have seen sellers offer a free car to a buyer w/ the purchase of a home. I think this gives more exposure to the property, but does not generate a sale in and of itself. The more buyers who look, the better oppty for a sale.......But......buyers will still comparison shop your property to others and go for the best deal.
When offering a car to a buyer, consult w/ your attorney and tax advisor.
For Realtor compensation, stick with cash.