The easiest way to get "your" deal is to provide some evidence it's not a crazy offer. When we bought our last 2 MH's I scoured the internet all over the US. I knew exactly what I wanted and found as many of that particular RV as I could. And I noted all their pricing. The lowest ones I called and asked for their lowest number. Armed with that information I started pitting dealers closer to home against one another. I would flat out tell them, I can go here and get it for a much lower price, even if it meant a $300 plane ticket. Once they know you are serious and you start throwing around prices from another dealer, they start to come around. But you can't just willy nilly come in and say I want 40% off. Different dealers have different margins and sometimes different MSRP (Not supposed to but they do). If Dealer A's 25% off is better than dealer B's 40% off, well then your % argument is moot. Talk dollars, not percentages and get competitive pricing.