sad thing is...we found a barely used coach on a lot with fabric and a jacknife sofa.
DW wanted the plastic seats thinking it would be more forgiving with spills, the kids, muddy camping, etc...
In my searching to make sure I was negotiating a good price I found a new unit, same model year on a lot about 3-1/2 hour drive from here. negotiated to just about the same price. It had teh plastic. the plastic seating defaulted to a fold out air mattress instead of the jackknife apparently.
i don't remember exactly the delta, but fair bet I paid slightly more for the new rig with the plastic DW wanted AND drove 7 hours + round trip for the pleasure.
Now...
I'd rather have the fabric
I'd rather have the jackknife