Purchase at Factory in Elkhart

As noted, only a handful of builders sell direct, and they tend to be custom orders only.
You can often get a better deal if you buy from one of the dealers closest to the factory.

That being said, a lot of dealers will not do warranty work on rigs not bought from them, and a number of manufacturers back them up on that.

So buying say 1500 miles from home, may cost you the trip there, trips back for warranty work or paying for it yourself.