National went under during the big crash. I owned an 04 Tradewinds for several years. The coach was well built. Few problems, nothing major. There are lots of so called orphan coaches on the road, these rigs are all a collection of parts from manufacturers still in business. Check tire codes as if original they aged out. Also you might post a pick, and give us info on the power train.
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2007 Keystone Challenger 5th wheel, Ford F350 Super Duty 6.7L Diesel, Short Bed, 2 dogs and the cat and rolling down the road full time since May 2014