If your serious about wanting to see various models of Airstreams close-up find out where a trailer rally is being held or better yet attend the "Alumapalooza" event this summer at the factory. I have been to this event at it is a great time! I got a good dose of "Aluminitus" or drank the "Airsteam Koolaid" while there.
We went in 2012 and there were 177 trailers and motorhomes. Most folks are more than happy to let you tour the trailers and talk aluminum at length. They also have factory tours, riviting contests, a few seminars and some interesting entertainment. The event is open to all brands of RV's.
http://alumapalooza.com/?page_id=85
We are on our third Airstream trailer and really like the one we have now. The previous two I fixed up and resold as a fun project. We have liked each an every trailer for different reasons.
My towing fuel mileage generally hovers between 11 and 13 (68 mph) depending on terrain, wind or the weight of my right foot. With a good hitch setup you won't feel the crosswinds too much.
If you look at a used trailer there will be a few items you need to pay attention to.
1.) Airstreams can leak like most any RV. If you keep up with the caulking (maintenance) this is generally not too much of a problem.
2.) Torsion Axles wear out (sag) and need to be replaced after 25 years.
3.) If there is floor rot it will be near the door entrance, around vertical seams near the front and rear of the trailer or in the rear trunk area. Take an sharp screw driver with you to poke around the edges of the floor, use your nose to smell for musty odors and a good time to inspect the trailer is a day or two after a good rain.
4.) A trailer with a good clear coat will retain the best resale value.
5.) Appliances are the same as other RV's.
6.) Good used trailers are available but you need to be ready to jump.
7.) A good DIY person can fix most items - even panel replacement if you have the time and talent.