Used 2015 AIRSTREAM INTERSTATE GRAND TOUR EXT 3500 for sale. One owner Very good condition only 51,000 miles. I replaced the house batteries a little over a year ago with amazing Lithium Ion ($8,000 upgrade) now we get power to run all through the night while boon docking. My wife and I traveled once across country than a few trips to Florida. I have maintained the vehicle at Colonial Airstream and Mercedes Benz dealers only. Issues : I recently brought in for service to Mercedes and the DEF fuel modulator needed to be replaced. They said the radio/audio system that was connected to the same power source shorted it out so they disconnected it no longer works. It was an after-market system that I had installed its been in the vehicle for years so I'm not sure what happened. Other than that the little exhaust fan in bathroom needs a new blade. Tires are two years old plenty of tread. Drives like a dream. This model has the two front seats and bench and rear seating. Ideal for a couple. Send me any questions. Price is low! Its actually just above the cash offer dealer price. No low offers!