I'm a Rexall fan regardless but in this case a bit more so. The engine is just breaking in and from the looks of the exterior and interior of the rig, the owner has probably taken really good care of the engine as well. An oil test would be in order prior to final purchase decision. This was a traveling rig.
The Newmar is okay and shows off what makes it a favored coach - quality build. Unfortunately, the refrigerator is small and dated despite its recent replacement. I'm also leery of the needed replacement of the dash A/C - odd at that low mileage. I'm thinking snow bird rig.
I'm with Altern and glamisorbust - the diesel Rexall is the favored choice.