And here it is, the amazing Lego Monorail Transport System (#6990)! Released in 1987, this huge set features 715 blocks and 5 mini figures. It was released back then for about $160 and I have seen it online for $1,800, insane! Its a co-worker that sold it to me, she knew that Isaac (and I) would love it.
It contains a Monorail track with two way stations and a train, a small cargo spacecraft, two containers and five Futuron astronaut minifigures. (3 yellow astronauts and 2 blue astronauts).