I would hope that few new rig buyers pay MSRP.
Discounts seem to range from 20% to 30% on a new, no-trade in, transaction.
If you are using NADA for your observations, be aware that there is little or no market transaction data used in creating the NADA values for RV's unlike the data they assemble for automobiles.
Dean
95 CC Magna, Jeep GC