I have a 1999 National Tradewinds 7370 and have been from east to west and north to south with very few problems. The Cat engine is flawless as long as maintained. The Freightliner chassis is solid and everything inside can be replaced with like products.
We have a Generac generator that has been worked on several times but always fixed. Replaced front air bags. Worked on levelers once. Fixed dash air once. And other than batteries and tires, all is good.
I don't know about price but you could look on PPL website and see what some recently have sold for. We have about 92,000 on ours and we like it a lot.
PM me if I can answer some questions for you. Best to you as you search and make a decision. Arnold