I bought a 1 year old Wilderness TT from a fleet used by Viacom for making movies locally. It was never titled or plated, actually pristine, but in retrospect I got no real discount and there was no incentive to buy it over a new one. I did get the full warranty.
I also bought a rental MH once - U-Haul. Didn't even know it was a rental I was the third (maybe fourth) owner. I finally figured it out by the outline of U-Haul in the hood when I waxed the nose. I was a naive kid so I didn't notice the fact that they had restored it with different colors of carpet and fabrics and it smelled like the bottom of a beer wagon. In retrospect I wouldn't get a rental again.