My advice. When you do find the one. Check every system, every outlet, every bulb and gadget. Don not be pressured into accepting the dealers word that "it works". Check yourself.
Examples. We bought a 2 yr old fifth wheel from Camping World in Tampa. The unit has a water heater that runs on gas or electric. They had powered up the systems for us. The water was hot, we took there word the elec and gas worked. Well the electric side does not work. The gas works fine. We were outright deceived. And, have no way to get them to fix it. Also, the oven does not work, I thought if the burners worked, Wrong.
Best of luck.