It's never a bad idea to ask for more than you want. However, if you have a fair dealer, then it will wind up being "reasonable". I agree with 94BULLITT....I think 18% is outstanding (that's right at what I got on my recent purchase). Now, I have wanted some additions, and they have been priced as parts only because I just bought the tractor. I was also given top dollar for my trade. I know from many sources that I will have help quickly if needed. (By the way, my add-ons have been installed at my house too- no extra charge). All that is worth a lot and sounds like what you are looking for in a dealer. I would take that kind of relationship into account. If you are not getting what you want from WHO you like and trust...you can always walk away. At THAT point, if you can't find the relationship with a dealer you want, drive for the price.... my dos cents....