There is no set percentage off for any class of RV, some dealers will negotiate while others are less forthcoming with counter offers. Since Outdoor RVs are mostly a west coast product with a limited number of dealers, it may prove to be more difficult to get a killer deal as compared to the mass produced units available from hundreds of dealers nationwide.
That being said a quick internet search had your unit priced from the mid 40s down to the mid 30s. Hard to say if the dealer in the PHX metro area is willing to play ball, all you can do is give it your best shot, at least it is a good part of the year to try to negotiate a price you can live with. Keep in mind, no matter what deal anyone has ever boasted about, rest assure the dealer made their profit margin and then some.
