Older bus style class a? As durable as they say?

Assuming you can either get maintenance records, or have the unit carefully inspected, the chassis will be the least of your problems. Remember, a 1998 coach also has 1998 house components which have gone that same 120k miles over 15 years. You need to carefully inspect any coach that old, from top to bottom. Drive it, try all the house components. The older high end coaches can be terrific deals, but it all depends on how well the previous owners kept up with them.......