Take it from somebody who's been in the business, you can pretty much throw away any books, especially the NADA book.
The only true value of an NADA book is as a guide to a lender when deciding how much to loan a potential buyer on a particular unit.
Frankly, it's all about the market, and supply and demand -- neither factor is taken into consideration when NADA determines their values.
I've always found that the best way to find the true value of your RV is to advertise it for sale at what you feel would be a fair price. No activity in a week or so? -- drop the price. Let it ride another week or so, then drop it again. Eventually, one of your drops will 'find the market' and the RV will sell.
Frankly, a $34,000 net to you on consignment doesn't sound all that bad, based on the figures you quoted, unless your RV is very unique or would be difficult for a buyer to duplicate within a reasonable shopping radius (say 300 miles, plus or minus).
I hope my ramblings will help you make a good decision.