GAAAAH!! I am so jealous! That is an awesome find! Seriously, I spend time once a week online trying to run down those old Grenadier sets.
The Grenadier company used to make a whole bunch of those sets. Quality varied - the later ones were better than the earliest. The figures are made of lead, so they are softer than modern figures, and therefore easier to clean up and modify. Lead also holds detail better than the pewter they use today.
Back in the 80's, everybody was into these, even guys who didn't play RPG's collected them. Lead was cheap, so you could buy a mini for 60 cents almost anywhere. Even Toys R Us carried them for awhile.
In the early 1990's, Congress outlawed the use of lead for things like this, and so the prices of these minis tripled while the quality dropped. After that, the demand for them fell and the only people collecting them were hardcore miniature wargamers and diehards like myself.
Excellent find. I hope they bring you as much enjoyment as they did me back in the day. ![Cool [8D]](/emoticons/icon_smile_cool.gif)