I have a 2017 Keystone Raptor 424T for sale. It was lived in for little over a year but was cleaned every weekend and still has a little bit of that new smell. When it was not being used the slides were pulled in and it was still plugged in to keep the interior cooled and air moving.
It is a 5th-wheel style hitch, has larger style fridge and convection oven/microwave, king size bed in master with a drop-down queen in the garage area which is 13 ft long. A large 5 person sofa with recliners in 3 of the seats, large shower inside and outdoor shower hook-up. There is storage underneath with slide-out for easy access, 6-point hydraulic auto-level system, and an auxiliary fuel tank next to the fuel tank for the on-board generator.