The RV should have a working engine with no leaks or other problems. The engine should have the proper amount of horsepower to pull the camper easily and effectively. The rest of the mechanics for the camper should also be in good working condition. Get a list of previous maintenance to see how well the previous owners took care of the unit. If the camper is new, then ask about warranties and the expected life for all mechanics.
The interior of the camper should fit all of your needs. Walk around inside the camper. Do you feel cramped? Check storage, bathroom facilities, kitchen facilities, bed space, travel space and any other features that are important to you. Make sure all light fixtures work and that there are no signs of water damage or misuse. When buying a new camper, ask the dealer if the interior of the camper has a warranty, as well as the engine and other mechanics.
The exterior of the camper is also important. Most campers are not much to look at on the outside, but it should be in good condition without peeling paint and dints or cracks. Check the roof to check for signs of leaks or recent replacement. When buying a new camper, ask how long the roof is expected to last without leaking or needing replacement. Check the condition of the tires and the wheels. Ask the dealer how long the tires are guaranteed before they require replacement.
Do not purchase a camper without driving it first. Take it out for a short drive on a variety of road surfaces. Check for sway and bounce, as well as other problems that can occur, such as slow acceleration, difficulty turning, difficulty stopping or visibility. Check other comfort issues as well, such as the placement of any nearby surfaces for food and drink and if the camper has a CD player or jack for an MP3 player. Look for other perks too, such as a DVD or Blu-Ray player somewhere in the camper.