The starting point for the dealer's offer is NADA Wholesale, and this book may be found in any good reference library. In general terms, NADA Wholesale is 8 to 10% below NADA low retail, so your dealer is doing what most dealers do. My experience has been to look at the total deal and not just trade-in value. If there is a big discount on MSRP, say 30%, then a low trade in value may not be too bad. If the dealer offers NADA plus 20%, but only 15% off MSRP, then this may not be a good deal. Negotiating a sale is not a time to get emotional about your old rv. You need to understand how much money is coming out of your pocket, what your monthly pay will be and what the total deal adds up to. I agree with others, if you have time to sell the old rv yourself, and are willing to do that, then you probably will get more for your trade in. In that instance, there is only 1 component to your new purchase, % off MSRP.