Do your research in advance
The first thing that you need to remember, is that whenever you go to a car dealership, you are almost always going to be hustled with. The people looking to sell you the car are going to pretend to know more than you, and will always seemingly be right.
In order to avoid getting charged extra, or in order to avoid getting fooled, you need to remember to do some research before you go in, so that you know the average price for the product in the market, and so that you aren't confused with what is told.
Another thing that you really need to remember is that you can just never agree with anything the person at the dealership is going to be telling you. These people are almost always going to be lying to you and you need to remember this and never agree with them.
Try to always use your pre learned knowledge in these cases, and ask them to lower their prices even further. This is the only thing that you can really do, and it is the only thing that will actually help you when getting the car.
Compared prices over the internet
Before going into any dealership, you need to know just how much each car that you might be interested in is worth. The prices of these cars vary from place to place, so put in a lot of effort and really try and find the best possible prices that you can.
Once you have this knowledge, you will be able to go ahead and call out the bluffs that the car dealership will throw at you, and you will be better equipped to call them out on this.