I found my 68 TW and it was in similar shape, paid a good deal less. Be aware, you will have a lot of work to do. The "right rear segment" will not be easy and most likely all the rear floor will need to be replaced. To do that you have to remove all the interior. There are may threads on floor replacement, I won't go into all the details here, but look at them and understand it is a MAJOR time consuming job. Check out TomW's web site on the restoration of his 67, 1967 Airstream Overlander
. He has lots of pics and you can get a good idea of what you are dealing with. It isn't rocket science, but it is dirty and take hours and hours. Axles will need to be replaced. Even if you do it yourself, and it is an all day 2 man dirty job, you are looking at 12-15 hundred bucks. The systems are all over 40 years old, don't expect them to work or if they do not for long. If you have lots of time and/ a big budget go for it. If you want to go camping this summer, find a newer trailer. I have spent over 7K on parts and stuff for my 68 already and have done the work myself ( I have no idea the number of hours but it is huge). Double or triple that about if you hire someone. But be aware that restoring an A/S is really a labor of love, it must be done right and most RV shops what a quick turn for the money. It may be "fixed" but is it done correctly.
Finally, there are lots of folks on the forums who will happy to go with you to check the trailer. If a all possible, get someone to go with you. There are lots of things to check and experience is the best teacher. Good luck with your quest for an A/S.