All Stingers have $10,000 markup. I wanted to test drive both the 4-cylinder and the 6 cylinder. Four-cylinder was a breeze to ask for a test drive. The twin turbo version though was a whole different story. The only twin turbo was in the showroom and I asked to test drive it. I was told we need to talk price first and run credit before I was allowed to test drive "to make it fair for the person that buys the car with low miles." I stated that I am very interested in purchasing the vehicle but I need to test drive it and not waste my time discussing the price for a vehicle I might not like. We kept going back and forth until I open up my banking app and showed them my account balance while I said "I will not need to have my credit checked, as you can see I can purchase multiple Stingers if I wanted." I was inside the twin turbo version within 5 minutes and test driving it (huge difference from the 4 cylinder!!). After the test drive the salesperson eagerly wanted me to follow him into the dealership I then told him " thank you for the test drives thank you for your time but honestly I really want white with the red interior and I will wait for the ridiculous dealership mark-up fee to disappear in a few more months you have my number call me if you get a white with red one without a markup."