There are always some well built, older class A rigs on the market, just have to be diligent in locating one before it gets sold. We first spent many months driving a variety of class a rigs in our state to figure which drivetrain, chassis, and floorplan would suit our needs best.
Once we knew what we wanted we stayed on course and searched the country, most were in FL, TX, and AZ as snowbirds would sell their rigs and stay permanently. Was quite a challenge as these units didn't last long on the market, not living in these states we couldn't close the deal fast enough.
Finally, we found a rig in TX and the private owners were willing to wait for us to look at it first. This was while covid was raging though TX July 2020, could not find anyone willing to do an inspection. Thankfully, we stayed 3 nights on their ranch, we were able to drive and test all systems thoroughly.