Welcome Tommy from Iowa. You have described a unique old Airstream which I'm sure will garner quite a bit of interest.
Determining the value of a vintage Airstream is difficult. I had my 66 Trade Wind appraised so I could insure it to an agreed value. You might consider getting your trailer appraised to market value. Small vintage Airstreams in good condition are quite valuable.
You will have to do some research on the Airstream Classifieds here on the forums. There may be similar trailers listed. A listing is not an appraisal and it is difficult to get actual sold amounts.
There is also Vintage Airstream which is a good site also. Look here:
Vintage Airstream - Airstream Trailer Resource
Good luck. Be patient, it could take a while to find the right buyer.