I've done a little searching around and found plenty of threads about how people go about getting a discount on purchase of a new car from a dealer, but not so much on how much people are finding they can knock the price of an approved used down. I'm considering an A5, Sline, Auto, 3.0tdi, would like the S-tronic gearbox, and obviously as many toys as I can. Looking to spend £15k to £20k, and chopping in my '06my, 120kmile, A4 2.0tfsi, Sline, Avant, Quattro, Auto. So I'd be grateful of anyone's experience of negotiating a deal with a stealer, what sort of amount you got off the window price, how much your tradein compared to the book price, which options you'd sacrifice in order to get a better price and which you'd say were essential. I.