I don't think you will have much luck getting a build sheet or window sticker from Wildcat. Seems that factory contact assistance has slipped into the negative side of positive since Wildcat Chris moved over to Jayco.
If looking for a price guideline NADA in my opinion give a very over valued figure especially if you start adding in options. If you are going to use NADA take the base number and add on options unless it is a couple of hundred for a second ac unit installed. A better way to find a valuation would be to go to Ebay and search your model under completed auctions. This will give you an idea as to what prices were paid or offered.
Of course it is also the RV off season which means some dealerships are offering some fantastic prices to clean their lot on new units. We purchased ours last year after taking a drive from Dallas to Muskegon, MI to look at a unit that we were give a price on. Saved a great deal of cash in doing so.
And of course keep in mind that there is no such thing as a bad deal as long as both the buyer an seller are happy after the transaction.
2018 Berkshire XL 40B
Past RVs: National Pacifica 40', Kenworth T300 Toterhome, Jayco Class C 32'. American Eagle 40',
American Eagle 40', Bounder 38' tag axle