The Ambassador was above the Neptune and below the Endeavor in the HR lineup. It is a good coach and should serve you well.
Go to PPL's web site and check their sold units for some ideas on pricing. Off of the top of my head, 90k US would be a bit steep, but if it is "like brand new", it could be a very good deal.
(On edit, I just checked PPL's web site and they show several Ambassadors sold, and the $90K does not appear to be out of line. Good luck with your final decision.)
Holiday Rambler Navigator DP, Hummer, and Honda VT1100C Shadow