Are there good used DP's under $40,000?

My brother bought a 2004 Tiffin Allegro Bus for $40K last Fall. He put another $10K into new tires, a few repairs (HWH level controller, all filters, all fluids changed, generator repair), a lot of upgrades (new TVs, antenna, curtains, bedding, mattress, various technical bits) and he has what looks and drives like a new RV. It is good for many, many years, many miles and many smiles.