1985 - Marvel Super Heroes Unpainted Miniatures Set #3

Marvel Superheroes Set #3
Scarlet Witch, Hawkeye, Spider-Man, She Hulk, Ultron, and Kingpin

And a few more images from Sanctum Sanctorum Comix
http://sanctumsanctorumcomix.blogspot.ca/2009/03/idol-pursuits-master-of-plastic-arts_9976.html

Sets #4 and #5 were never produced.
Marvel Superheroes Set #4
Angel, Cyclops, Invisible Woman, Mystique, Vision, Daredevil, Juggernaut, Vulture, Beast, Hobgoblin, Mandarin, and Iron Man.

Marvel Superheroes Set #5
Aurora, Guardian, Punisher, Snowbird, Cloak, Howard the Duck, Red Skull, Taskmaster, Dagger, Puck, Shaman, and Talisman.

http://www.cs.cmu.edu/~tpope/sol/tsr/marvel-super-heroes.html

1984 - Marvel Super Heroes Unpainted Miniatures Set #1 & #2

Marvel Superheroes Set #1
Captain America, Dr. Octopus, Hulk, Thor, Mr. Fantastic, Captain Marvel, Human Torch, The Scorpion, Spider Man, Thing, Radioactive Man, and Dr. Doom.

Marvel Superheroes Set #2
Sub Mariner, Iron Man, Rogue, Colossus, Nightcrawler, The Leader, Kang, Magneto, Ariel, Doctor Strange, Wolverine, and Storm.