Star Trek: The Next Generation - Complete Series (1987) for $199.99

TNG could so easily have been a failure, but it wasn't. It survived a writer's strike in its second year, the tragic death of Roddenberry just after Trek's 25th anniversary in 1991, and plenty of competition from would-be rival franchises. Yes, its maintenance of an optimistic future was appealing, but the strong stories and readily identifiable characters ensured the viewers' continuing loyalty.