I year ago in November, we bought a 10 year old Safari Trek. When we drove it out of the PO's driveway, it had 5023 miles on its Ford F53 chassis. Now it's got over 11,000 miles without any issues.
The story we got was that the original owner's wife came down with cancer right after they bought it and it languished in storage for those 10 years before being traded for class 'B'. The dealer put all new tires, batteries and slide toppers on it before trying to auction it off on eBay. No bids met the minimum and they later sold it to the people we bought it from in the summer of 2014. All Treks have a bed that stores up at the ceiling when not in use. That's not everyone's cup of tea. They used it a few times and decided it wasn't theirs either, put it up for sale again and sold it to us. We were delighted to buy the model we were looking for with such low miles and have never regretted it.
With all that being said, there are some paint issues - sun baked clearcoat on the front and rear caps that needs repair but that's about it. I recently had to replace a defective refrigerator control board but it worked for almost a year for us before it failed. Just because it's got low miles, don't expect anything you buy to be completely trouble free.