Leasing may impact the dealer's desire to do a dealer trade because leasing involves a different set of financial arrangements compared to buying a car outright. If you're leasing a car, you may need to negotiate different terms, such as the lease length, mileage allowance, and monthly payments, which could affect the dealer's willingness to engage in a dealer trade. Additionally, dealers may have different incentives and priorities when it comes to leasing vs selling cars.