[a/s] Looking at a '68?

[N3SW@xxxxxxxxxxxxxxxx]

I have an opportunity to look at a 1968 24-foot trailer 
tomorrow morning, described as "very good" condition, 
asking $3500.  I am an Airstream wannabe, but have no 
experience.  I would appreciate any advice from list 
members on what I should look for in assessing a used 
trailer of this age.  What are the gotchas?
Were 68s well-made, in general?  This one has been parked 
for years, its travel history is unknown.
Thanks.