Generally online most people will tell you 25-35% MSRP is about where you want to be. Obviously with the model that RV’s are sold you won’t find a Edmonds or equivalent to help you get the best price.
Some say packages, for us that did not work out well. I ultimately had price in mind, I did’t have a trade so I just held to the price. The second time we went and were serious, I ended up leaving when we could’t come to a deal. Over the course of the next week our salesman called to followup and they came down a bit to a price that I felt comfortable.
I personally did’t not discuss cash or financing till after we agreed to a price. The only thing that tripped me up was they wanted to add a “starter package” with a hose and sewer line and battery. I refused this package as I wanted better quality stuff once I have done my research.
Good luck @SeaDog!