Thank you all for the feedback - it has been helpful in my decision-making process.
For the inquisitive minds, the salesperson was supposed to send me pictures last night or this morning, and I haven't heard from him. So, I don't know whether or not the trailer was totaled or if it has a salvage title.
In the meantime, I have pretty much decided to go with a new, undamaged Airstream. I fully expect that it will collect dents and perhaps other marks over its lifetime, but they will then be part of the stories of my own adventures.... Thanks again