I would not do the buy it now deal, let it bid out till the the auction is about to end. I don't think it will get over 35-3700 in bidding.
If you want it now I would send him a mail and offer him 3800 or so. NADA is what dealers are selling them for not private sellers. Private sellers generally get the loan/trade value.
Nice time of year to ride one back from Corpus