In my opinion, you will get screwed by this dealer.
Once you sign, it is yours and you will never see that new wall.
If they were honest, that camper would have already had a new wall before it went on the lot. RUN do not walk away from this "deal".
Water in walls is what KILLS campers. It should be headed back to a major repair facility, not a local dealer's chop shop.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW