Tiffin Allegro 2007 Roof

That does not look "normal" to me. Something might be wrong.

Hard to tell from picture but does look like water damage.

I would check to see if the fiberglass seems "loose" in those areas. Our roof, also a Tiffin, is fiberglass also, does not have that ripple effect. It appears there may be a leak is around the AC unit. If you can't check it in person or have a non-interested party look at it, I would keep shopping.

The photo is all I have, I'm the other side of the country...I might give this one a miss. Thanks.