Eu Wagon: dealer recommendations?

Dear EU-new cars experts, I have been working on the topic of EU new cars and I would probably like to order a Kia Sportage. I have seen some good offers. Now I am looking for dealers to compare. Where have you had good experience? The most important criterion for a dealer is that no advance payment is expected. I pay cash for goods – so only when the car is actually picked up. I come from Lower Saxony, but I am definitely from Lower Saxony. also ready to go to NRW, Berlin or similar. Look forward to receiving hints about your dealer experiences.