Sold one I had on lake austin couple weeks ago for 70mil, see another one on Napa sell a week or 2 ago for 53mil. I also sold my white stuffy bear on napa for 33mil to same buyer who got the other dwagon at 53mil on Napa. I think setting a 40mil opening bid on them and let it work from there would be a fair start to you and to the your bidders you will sell it for sure.