I've seen them at swap meets from 15 to 50 bucks in that type of condition,,they are not in big demand. HRP
Yep, there is a guy in Kingman on Craigslist that has been trying to sell his for $20 for several months with no takers.
The company still makes those spotlights and they sell parts for them also so they are not rare or valuable. Here's the link to Unity: http://www.unityusa.com/