We didn't have much money in our household and Star Wars figures tended to be expensive. Charles Piser from the Black Hole ended up being Luke (I didn't like Luke enough to shell out any money for him!). I used anything I could get my hands on including Airfix Eagles, M.A.C, Star Trek, Black Hole, Battlestar and of course Micronauts.
I had a mountain base from M.A.C and a Starbird Command Base - all second hand.
Wonderful times.