Rippling of roof?

[livin_the_dream]

We have found a 2018 Jayco Eagle 5th wheel with a great floor plan that we love. However, as we were looking at the unit today, my husband discovered the roof is "rippled" and doesn't appear to be solidly attached. Several nearby units had the same issue. Has anyone else encountered this before? Worried this could be a potential big headache and indicator of other quality issues.
Thanks for any info!

[ScottG]

Small loose area's about the size of a quarter or even a silver dollar are *common and wont spread but if there's actually a ripple, I would pass it up.

*Common but a sign of lousy workmanship.

[Lwiddis]

Roof doesn’t appear to be solidly attached? Nearby units the same?
Run. Run now. Run fast away from these units.

[goducks10]

Move on. Too many out there that don't have ripples.