One of the biggest toy lines of the Eighties, He-Man and MOTU as it's known to collectors, was a joy to find at boot sales. Usually it would be brace of fine loose figures and very occasionally a boxed toy like the Slime Pit or the Fright Zone. If you found the Eternia Playset you could retire! I'm still working.
MOTU toys were often nuzzling up against Ghostbusters and Thundercats stuff and, aside from the ubiquitous Star Wars merch, the three of them formed the holy trinity* of 80's action figure lines and would appear downstream at the same time at boot sales a few years later. Anyone else collect MOTU readers?
* Ninja Turtles and GI Joe could also be seen as Eighties biggies but for me it was the three lines I mention. Which were the big 80's toys for you readers?