Historians will probably treasure these bikes in years to come - or maybe not. Reality is that these silver brazed machines could embarrass a lot of Italian iron of the time. Then Trek became confused and ventured into uncharted territory and alienated us purists. As we know, it was widely successful in doing so. Torpado Most examples are fairly mediocre.
Value is pretty much a function of their parts value.
In the early 80's there were some nice ones with pantographed parts. There were cheap mass-produced Urago biyclces and then there were absolutely spectacular Urago frames. One example we worked on a few years ago was among the finest bicycles we ever saw. Brazing and mitering were gorgeous, the arrow point on the side of the forkcrown was exquisite, and the ride of the bicycle was superb. Lesser models would have values based largely on their parts.