The quarters look clean...with it being from North Dakota, there's a good chance it's very solid. Let's hope so, and congrats on your upcoming purchase.
UPDATE; Yes I stated, I am talking to the owner, yes there is rust in the quarters, yes I have a price and am going to look at it the beginning of next week. There is a 90% chance at this point it will come home with me.
I got my Monaco from North Dakota and it was pretty clean just a little rust on the bottom rear quarters. Floors and frames are usually good on cars from that part of the country.
Good luck, hope it works for you. This is my kind of car as mentioned earlier. Honest 2 door ginormous car with nothing hiding behind shiney paint.
I am very jealous.