I don't believe that there is a set percentage that you can expect to chalk off the figure that they are advertising. It's really all about negotiation. You are in a strong negotiating position but, according to a friend in the motor trade, dealers tend to offer more discount to those who are taking a car with a degree of finance as this is frequently where they make most money. However, I believe that you need to have a figure in mind that you are willing to pay and do not be swayed to pay more than that. There will always be another car and do not be afraid to walk away from the table. You'll be surprised how often you receive a phone call a day or two later with a better price. I do not know how much experience you have with these types of negotiations and I do not wish to sound condescending but I always go in ready to play hard ball. Always push for a full set of mats, 12 months road tax and a full tank of fuel. I would also say be tough with the salesman but build up a rapport. They are far more willing to work out a deal if you are a polite and courteous, allude to future business and you'll be surprised how much smoother negotiations go!
