Rick Jay
Look at the Bluebird Wanderlodges. They were high end coaches when they discontinued the RV business around 2007. I recently saw a 2000 Wanderlodge LX tandem axle for sale on RV trader for sale by second owner. Approximately 27,000 miles always garaged, second owner who has owned it since 2006. I believe it had a Detroit Diesel 400hp engine. This was a top of the line motor home in 2000. I think the asking price was $77,000. I read an article a couple of years ago that stated if anyone was looking for a used diesel pusher they should always consider Wanderlodges I also saw some 2005-2006 LXI's for 120,000-160,000 range, all with under 100,000 miles.
I would say a Detroit Diesel under 100,000 miles is not even broken in yet. No engine regens or DEF. Probably have minimum pollution control.