As someone looking for a 25B21RB. I want that floor plan because of the larger dinette, and better layout (personal opinion). I am not interested in a small dinette that has a view of the neighbor's area. By this I mean in standard campgrounds the space in front of your door has your table and
awning, while the backside is the place your neighbors will be hanging out. There is also the issue that the front bed model had a recall due to too little front
weight.
Things I look for, how it was stored, the condition of the roof caulking, is the trailer clean, rot of any kind. And basically how well taken care of the trailer appears.
I looked at a
bigfoot that had all the features that I wanted, but had clear signs of neglect. The nail in the coffin was some wood rot next to the door. Lots of red flags that the owners did not take care of the trailer.