Inspecting a Jamboree Searcher tomorrow – any advice?

I'm looking at a Ford E350 Jamboree tomorrow, however the badge on the door says F150. It has 140,000+ miles, so it's definitely seen some use. These vans aren't common in my area, so I'm hoping for some guidance on what to inspect before I buy.

I'm especially interested in knowing:

• Common issues with E350 Jamborees of this age and mileage
• Specific things to look for during the inspection

Any advice from experienced RV owners would be greatly appreciated!