Except for needing a paint job, it appears to be in good original condition.
http://denver.craigslist.org/rvs/3606820651.html
I always hate when these craigslist links are deleted, so here's the original post and photos:
1958 Oasis "Canned Ham" Trailer - $1900 (Littleton)
Classic Oasis 1958 16ft "Canned Ham" Trailer, $1900
Call Joanne at 720-988-9096