While I think USAZorro exaggerates a little, based on the seat height and the tilt of the bars, it probably is too big for you, if that is the way you have it adjusted.
I don't know much about Univegas, but it appears to be a middle of the line bike from the mid 80s. The Suntour Cyclone components are gaining popularity. It does have some nice looking lugs. If you clean it up and put a different saddle on it, you could probably get close to $200 for it. Depending on the market, you might even get more, especially if you part it out.