2016 Keystone Montana Luxury Fifth Wheel Series M-3790 RD for sale. 1 owner and only used a couple times a year. This camper is literally like new. Owner is getting ready to retire and downsizing is the reason for selling. This thing is loaded and has it all. Central vac system, washer/dryer hookup and best of all it has the 4 season package offered by Keystone.