Try and go on the roof and look at the seams/joints. Look for cracks in the sealant that need attention. Check out the two coach/house batteries as well as the chassis battery. They may need to be replaced. The tires are an important issue. Not just the wear but are they dry sun damaged. Try out every system/slide(s) to be sure they all work properly. Sit in all of the seats/table area. Look under the bed(s) for any form of mold/damage. Ask for any and all repair records. Look at the oil and transmission fluid for wear/unusual smells/colors.
Paul
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