This was one of the iconic handguns that was part of the handgun hunting trend in the late 70s and into 1980s. Others being the Python, the Ruger Redhawk, Contender, XP, and so on.
With that said, $3500 is a bit optimistic unless there's something else about this gun that makes it special. While anything can sell at any price, I would say the odds are stacked against getting $3500 for an average one on a regular basis. Good luck to them. Obviously, a look at auction results both online and live gives a better picture of what is realistic and it isn't $3500.
Grouse