You got to play the game. I am in the process of getting a new F250 Service body truck for work right now. Got the two biggest Ford dealers working against each other. Get a price from one then go to the other than back again. Its a pain in the ass but it is what it is. I do it with all my work trucks since they tend to not be emergency or emotional purchases, just trying to get a good deal on the truck we need. My best friend has been in car sales for over 20 years, everything from new to used, Kia, Honda, Chevy, and Ford. He has been a salesman, sales manager, Finance manager, and general manager. He is a great guy but he admits the sales thing is a game of who can hold out the longest. But most dealers do have a line they will not drop past. Used car only dealers are the most shifty, the bigger dealers tend to be more cut and dry.
Good luck and stay at it with them. I will say that there are some smoking good deals on 2024 left overs right now on both on F250s and Broncos! If you want to go down the new car road.