Seems like that 15k miles is pretty low for a 15 year old coach.. Not sure that's a good thing.. Just saying..
The eBay add said 80,000 miles which should be just fine.
I note that it has the same floor plan as my 2001 which I prefer. This floor plan provides more closet space than the bath and a half model. Some like apples and some like oranges.
The listing on ebay says this coach has a Cummins engine.
http://www.ebay.com/itm/2000-Newell-Coac...1131993803
While I guess it is possible, the build sheet and original floorplan show a Detroit Series 60, so my guess is that it still has a Series 60 in it, not a Cummins.