I have a 96 Vectra Grand tour, with the 5.9 6bt cummins, awesome coach with a great ride. The Luxor was a great coach, I considered one before I found the Vectra.
That year may even have the quiet diesel gen set, added bonus.
But,With that said I think that price is really high.
All of the manuals, drawings and part numbers are available on-line and Winnebago still supports that unit.
Check for windshield leaks, that glass is bonded to steal just like in your car but if it has had leaks for any length of time the windshield frame could have rust issues you cannot see.
1996 Winnebago Vectra Grand Tour 35WQ-P
5.9 6bt 12 valve MD3060/6