Airstreams up to 20 years old (NADA guide)
http://www.nadaguides.com/RVHome.asp...wPr=0&wPg=2005
(includes motor homes)
Vintage Airstream trailers (25 or more years old):
http://www.vintageairstream.com/rr_t...condition.html
These are guides only and not intended as a definitive source for value on all used Airstream RV's.