Don't pass up a nice rig simply because it has few miles on the odometer. Find out why and how well it has been maintained. Make sure that everything in the housebox works properly, especially the house batteries and charger/converter, fridge, roof AC, furnace, water heater, freshwater system and expect these things to eventually die or need repairs. As warned above, inspect for any signs of water leak damage and professional repairs made, replace tires over 5 years old, have brakes serviced including new flex lines and brake fluid flush and engine cooling system condition including all belts and hoses, water pump, clutch fan and radiator.