Several reasons:
1. The NADA options list is generic - it includes all conceivable options for all RVs of all years and price ranges. You have to know what was indeed an option on yours. Few things on that list are options on newer Rvs.
2. The NADA price is "as typically equipped", so your model may include items that actually were factory options, but are options that most dealers order when they get RVs for their sales lot.
3. The dealer won't give you any extra trade-in for any options anyway. In fact, most of them don't even look at the rig to quote you a trade-in value. They just want to know the year/make/model.
