RailScope was just way ahead of its time, much like the postwar Electronic Set. Had it been made today, it probably would've worked a lot better. Still, like most of Dick Kughn's ideas like RailSounds and TMCC, it was a good one and the engine is still pretty darn attractive.
I've never thought of purchasing one, but if I did, I would've tried to fully update it with modern camera electronics. I guess no Lionel Trains Inc. collection is complete without it.